[felixfbecker]

I think the kind of teams that always stay on top of the latest TypeScript version and use the latest language features are also more likely to always stay on top of the latest Node versions. In my experience TypeScript upgrades actually more often need migrations/fixes for new errors than Node upgrades. Teams that don't care about latest V8 and Node features and always stay on LTS probably also care less about the latest and greatest TypeScript features.

[jitl]

I work on a large app that’s both client & server typescript called Notion.

We find Typescript much easier to upgrade than Node. New Node versions change performance characteristics of the app at runtime, and sometimes regress complex features like async hooks or have memory leaks. We tend to have multi-week rollout plans for new Node versions with side-by-side deploys to check metrics.

Typescript on the other hand someone can upgrade in a single PR, and once you get the types to check, you’re done and you merge. We just got to the latest TS version last week.