A maintainer who will convert bzip2 to Rust, where the rest of us who aren't sold on the new religion won't be able to run it, because the priests of the new religion don't give a flying pterodactyl about any operating system which isn't GNU/Linux and maybe Windows. Oh, and up until now I could fix bzip2 because it is written in C and I could actually understand the code and fix it. Now if by some miracle I even had a Rust compiler, the "maintainer" would indirectly force me to learn Rust, because of course I should spend days chained in front of a computer rather than having a life, learning yet another fashion fad, extremely horribly put together mishmash of an object oriented programing langauge (if you have methods, you are object-oriented, no excuses will work with me).
We are such a horrid industry. Information technology is going deeper and deeper down the drain amidst trend pandering and wheel re-invention. If I could get out I would yesterday. It's a sad day when a computer enthusiast with a formal education in computer science like me is brought down to that.