NathanielK

If you're trying to cancel out a loud 100dB+ environment, that means the driver needs to be blasting at at least 100dB.

Any harmonic distortion in the headphones will be introduced relative this, as well as being in the higher frequencies where it's less noticable, but still may cause hearing loss.

I've used ANC IEMs instead of proper hearing protection around loud machinery before and although it may have felt quieter, my ears still "rang" afterwards so I was causing permanent hearing damage. People who think ANC "sounds quieter" and use it instead of proper hearing protection (or just turn the music too loud) will definitely suffer hearing loss, though not directly because of the ANC.

I am not an audiologist, but an interesting similar issue happens with our eyes. If you wear tinted lenses with no UV filter, your body will be happy that it looks darker, and open your iris more. Now since your iris is open more, you actually cause more UV damage to your eye without noticing. I remember this being a big story when polarized 3D movie glasses came out and people were keeping them on outdoors.

A really weird side effect of this is that there are "objective" tools for comparing the dynamic range of different releases.[1] Vinyl releases will consistently measure much better and have "nicer" looking waveforms, even if they were mastered identically.[2]

[1] http://dr.loudness-war.info/

[2] https://www.youtube.com/watch?v=n-AE9dL5FG8

Not quite the same, but there's a product being developed to adapt M.2 2242 NVMe drives to Expresscard, the other hotpluggable PCIe standard. Most expresscard implementations are only a since lane of PCIe v2, though some of the new "P" series thinkpads support v3. Being a single lane limits it compared CFexpress, but it's still a bump over AHCI drives.

Thinkpads up to 2013 also had a tool-less removable disk drive that allows for hot swapping 2.5" SATA drives in seconds while keeping them safe inside. This has been abandoned with the obsolescence of optical drives though.

> The CFexpress memory cards have a PCIe electrical interface, but they are mechanically identical with the older Sony XQD cards, i.e. they are solid, rugged, not flimsy like the SDXC memory cards

I agree, though with SDExpress becoming standard soon there is a much realler possibility of future laptops having pcie microsd slots, which might be good enough if you can find a durable model.

[1] https://thinkmods.store/products/expresscard-to-nvme-adapter

That's pretty neat. Do you have any pictures? I have never seen that before from automotive OEMs.

> choosing that particular eMMC, likely not something specced for very high write endurance, or not speccing a larger amount of flash to spread the write endurance out over a period of up to 20, 25 years.

The problem is that there isn't any wear leveling happening at all, so if you have an event that happens at every boot up and is logged, it wears the same block every time.

> not making that a socketed/removable part. It's a very integrated module, I don't think socketed ICs have been a thing in automtive for a long time.

edit: I'm wrong, daughter post has a nice run down

If you're curious the very long forum thread is a lovely read.[1] You can see the chip levels itself, because just soldering in a bigger chip with the same code on it makes a big difference to many customers.

https://teslamotorsclub.com/tmc/threads/consolidated-emmc-th...

Smaller subreddits are beings dead is partially due to reddit's Hot ranking algorithmn. It is designed to have fresh posts up top on the daily [1]. Unless you switch to an alternate rating scheme (monthly top is helpful), any subreddit without hundreds of posts per week is basically dead.

Large subreddits with thousands of weekly posts have the opposite problem, where low effort posts will dominate the top if unmoderated. [1] https://medium.com/hacking-and-gonzo/how-reddit-ranking-algo...

In Tesla's environmental impact report [1], they estimate the average car in the US is driven 12,000miles/year for 17 years before it's scrapped. They amortize over this period for their lifecycle C02 impact of a Model 3. From my own research, this number is a good guess, though it's region dependant. This doesn't match the OP which claims Tesla's are only engineered to last 6 years before expensive maintenance.

[1] https://www.tesla.com/ns_videos/2019-tesla-impact-report.pdf (page 8)

It's not, the issue was there is no wear leveling, so it's 1.4 writes per day. This is approximately 2 trips a day, 5 days a week. Reading between the lines I believe the car "eats into" the 3000-5000 cycles everytime it is cycled on.