Only if you need the touchbar. The non-touchbar model can be had for $2599, including the horribly overpriced 1 TB upgrade. If you can figure out how to use an external drive (Samsung T3 is $349, tiny and performance should be roughly on par with an internal drive), you can knock another $250 off that and still have the 256 GB that comes with the standard configuration. As a plus, the T3 is trivially upgradable when storage prices inevitably fall over the next couple of years. Even if you chose a Mac alternative with user-accessible internal storage, the process of swapping out the drive would be somewhat involved and require an OS re-install.

I've never understood the obsession with having a ton of internal storage in your laptop. I'd rather buy external storage since it allows me to upgrade my laptop independent of my data and makes migrations easier. It also saves money given how much cheaper external storage is and becomes over the life of the laptop.

So the reason the replacement is so expensive is because you've coupled yourself to a particular OS and so your replacing a macbook with another macbook. Even though there being other cheaper and more powerful options.