I recall when Mozilla announced that they were dropping legacy extension support, people were upset. Firefox legacy extensions pretty much had free reign in the browser internals, making them very powerful, but also making performance improvements difficult and API changes a headache. Now that Firefox has "done a Quantum" and vastly improved performance, it has won back some users, but there's still a vocal contingent of legacy extension fans holding on to some old Firefox version or a fork.
I use Atom precisely because of its extensibility, although I'll admit I wish it were faster sometimes. I've never used VS Code but I understand it beats out Atom in performance by limiting extensibility, much like what Firefox Quantum has done. So I feel "Atom Quantum" already exists in the form of VS Code, and Atom going that direction would cause it to lose whatever proposition it has in the eyes of its users (who do exist, although you wouldn't be able to tell from this thread alone) and turn it into "a crappy VS Code/Sublime knockoff."
TL;DR: As an Atom user, I would much rather Atom keep its focus on extensibility and make performance gains where possible, rather than drop its focus and try to become VS Code.
I use Atom precisely because of its extensibility, although I'll admit I wish it were faster sometimes. I've never used VS Code but I understand it beats out Atom in performance by limiting extensibility, much like what Firefox Quantum has done. So I feel "Atom Quantum" already exists in the form of VS Code, and Atom going that direction would cause it to lose whatever proposition it has in the eyes of its users (who do exist, although you wouldn't be able to tell from this thread alone) and turn it into "a crappy VS Code/Sublime knockoff."
TL;DR: As an Atom user, I would much rather Atom keep its focus on extensibility and make performance gains where possible, rather than drop its focus and try to become VS Code.