This is made irrelevant for 90% of users who then use their keyboard & monitor in Discord, VS Code, and dozens of other JS-powered programs and sites.
In fact I took the time just now to run a few samples in Discord and it's looking like I'm getting the same 35-40ms keypress to photon latency as gVim with one 80ms outlier out of the 5 runs I did.
Compare this to any operation in Sublime Text/Merge and the difference is obvious.
The implication is also that more battery power is used for every action (not to mention vastly more memory), which matters for machines of any capability; but these are not latency-related concerns.