Problem with “alternatives” like foicica.com/textadept/ that are written on top of the good old Scintilla is one (IMHO)… the Scintilla’s implementation of multiple selections is currently incomplete and corky in comparison to ST’s… if this was properly fixed I’d gladly callopen-source editors written on top of Scintilla good alternatives to Sublime for sure.
For more info about what I mean check this ancient issue https://sourceforge.net/p/scintilla/bugs/1224/.
It’s not just the fact undo/redo history of multi selections doesn’t work… it’s also the fact you’ll be forced to have a “main” selection always present in Scintilla… while in Sublime a multiple selection can become an empty list.
Summing up, Sublime implemented the multi selections feature the right way from the very beginning and Scintilla, the main “alternative” to ST has implemented this “must” feature years later to its creation and the author didn’t put enough love into it so the result still needs to be improved to become the real deal
That said, if Scintilla fixed that properly I’d strongly believe it could become a serious contender to SublimeText… you mention VsCode, Atom or other slow competitors. Personally, I won’t even bother to waste my time testing out these electron things as the very foundation is just wrong (sorry to be blunt here)