way provider of information for font-locking, indentation, and syntactic classification.

But I confirm that LSP solves at least the first 2 of these 3 things.  As to its

practicality, I'm reasonably sure that many on-line editors such as godbolt.org,

hackerrank, etc. use LSP extensively.  The font-locking is very acceptable,

even in larger files, and I'd be surprised that this font-locking is supported

by anything other than LSP.

João