The last time I had things randomly break under me due to elisp was a long long time ago. Such that, I really can't remember it.

And as a user of emacs, the stability has been quite nice. The speed has mostly only hurt around things I'd expect to hurt. (Long long long lines, for example.)

I can see the allure of language servers. But, to me they are basically a modern cscope. With json being the transport. Not bad, but hardly magical or unforseen. (Granted, getting the pockets of microsoft has been nice.)

What sort of spontaneous breaks are you referencing?