I'm no more thrilled than you at the cost of running ESLint, but using a high-level language doesn't need to mean being wasteful of resources.
TS currently wastes tons of resources (most especially peoples' time) by not being able to share its data and infrastructure with other tools and ecosystems, but while there would be much bigger wins from tackling the systemic problem, you wouldn't be able to say something as glib as "TS is 10x faster". Only the work that can be distilled to a metric is done now, because that's how to get a promotion when you work for a company like Microsoft
If I could choose between Typescript speeding up 10x or all the surrounding tooling speeding up 20x, I'd take Typescript in a heartbeat. Slow type checking is the biggest pain point in my daily dev cycle.
Thank you Typescript team for chasing those promotions!
TS currently wastes tons of resources (most especially peoples' time) by not being able to share its data and infrastructure with other tools and ecosystems, but while there would be much bigger wins from tackling the systemic problem, you wouldn't be able to say something as glib as "TS is 10x faster". Only the work that can be distilled to a metric is done now, because that's how to get a promotion when you work for a company like Microsoft