"I'll be 30 fairly soon and am I the only one who doesn't find learning new technologies all that hard? Is it going to get harder soon?"
I'm 40, and it's easier than ever.
I do get a bit pissy now when I have to spend a week learning some technology that I end up using for 15 minutes to do one thing, and then discard, but that's about it. (That has, unfortunately, happened.) But otherwise, it's easy. I've done non-trivial development now in languages that I don't even properly know, I just know all the surrounding languages and how to Google fast enough to make up for the rest.
I will also get a bit pissy when I do one project over here and they're all in Ansible, and I do another project over here and it uses Salt, and then I tweak something over there and it's in Puppet, and then I have to help out over there and they're in Terraform + Docker + some home grown Compose thing that predates Compose, etc. That general category of things was a legit advancement and I prefer using them to what came before (in my world, nothing but precious snowflake servers), but I'm frustrated that I have to keep relearning the easy "surface syntax" stuff over and over again for what is almost the same exact task.
I will also admit to a bit of impatience with the "re-inventing the wheel" phase of new technologies. For a recent example, the initial AWS "serverless" stuff (dumb name, inevitable idea) was written with like zero attention paid to the basic needs of source control, or the utter inevitability of how your service that was designed to have like 10 5-line scripts in it will be used to implement the next Amazon, so I stayed far away from it. Even now I'm not sure it's all that great. Docker I'm still not all that up on for somewhat similar reasons; for all the "innovation" in it it took years to be able to do basic things halfway properly. I'm definitely kind of done riding the cutting edge in the sense of chasing down communities that I can look at and tell are just going to be chasing their own tails for the next couple of years.
Sometimes a tech community comes out led by a person or a team that has experience, though, and when that happens I'm all over it.
Plus at this point there's literally so many things going on that nobody can keep up, not even the "young bucks". There is not a single person on this planet who is at expert level with all of the cream-of-the-crop Javascript frameworks, and there hasn't been in a long time. There's just too many now. When $YOUNG_GUY is up-to-date on 80% of the hot new shit and $OLD_GUY is sneering at it and up-to-date on 0% of it, back in the 1990s and such, yeah, $YOUNG_GUY might have an advantage. But when $YOUNG_GUY is up-to-date on 3% of the hot new shit and $OLD_GUY is up-to-date on 1.5% of it, and also knows a lot more stuff and can drop into a much wider array of projects and contribute (with the contribution being something other than "Let's rewrite all of this in $HOT_NEW_SHIT before we do anything else!"), the difference is far less extreme, even on the new tech's terms.
Unsurprisingly, computer programming isn't such special and amazing stuff that, almost uniquely in all the fields of human endeavor, you're worse after doing it for 20 years than you were after doing it for 2. Other than cases where the body itself just breaks down, like professional-level sports, almost nothing works like that. I think it's a historical accident of some very unique circumstances in the 1990s that have lead anyone to believe programming is different. I think the idea has gone a long ways towards dissipating already, but has a long way to go yet, too.