It’s a two-fold curse - first, every single program these days isn’t a stand-alone program, it’s a glorified web browser. Hand-in-hand with that is the fact that, in order for these webpages-disguised-as-programs to behave in the way you normally expect a modern UI to act, it has to have five layers of javascript frameworks, each adding its own pile of cruft to the slagheap that is modern app design. It’s horrendous and I hate it.
I even tried to migrate mine, and it failed. After deleting my Mojang account.
Tech support made a token attempt to help me and then gave up. So much for my capes, I guess…