I'm excited for this, but I'm not looking forward to yet another round of refactoring for all of the linters, formatters, bundlers, etc. I still haven't fully migrated every project I maintain to eslint 9.
I don't know, hopefully not much! Just reading the article about IDEs using one version of typescript and builds using another, along with some incompatibilities. It raises concerns there will be some hiccups with various dev tools.