Bits don't rot.
And if you want new bits with the new features, those aren’t the same bits and that work isn’t free.
But increasingly, developers can't even manage to keep version X around and working, despite them having to simply not do anything to it to keep it from breaking.
Hey, it's their software, they are all volunteers and can do whatever they want. I'm grateful for the short window of time in which I was able to use their software. I don't get to decide their support period, but I will still hopelessly complain about it. "Deliberately breaking compatibility with a computer because it is old" is my biggest axe to grind with the whole software industry, and I'll shake my fists at this cloud until I die.
I'm salty today because I tried to run Fusion 360, and found that Autodesk just out of the blue decided that 1. My computer is too old to run the software (which ran just fine a few weeks ago on the same computer); 2. That I needed to update the software, and 3. The update will not run on my "old" computer. They took software that ran fine on my computer and deliberately pulled the rug out. Fuck Autodesk. I'm spending the entire afternoon exporting dozens of files I have on their cloud, one at a time, since they apparently can't even manage to keep an existing version of the software running.