Rust and RISC-V both feel like they've reached critical mass and I'd guess that they'll be used more in 5 years than they are today.
What other technologies fit this description?
My favourite pull requests are PRs that are obviously correct after you've read the description.
I'm a fan of simple issue trackers. A description, comments, and maybe a small integration with something.
Given this, perhaps it makes sense to build your own? You get a bespoke solution, and focusing on your main project prevents feature creep.