Nonsense. Many emacs users spend their whole lives inside of it so they're quite sensitive to what is actually an improvement and what is not. The arrival of the various modern completion packages -- vertico, orderless, consult, etc. have been welcomed ... but note that these are all add-on packages. Likewise, all of the "improvements" provided by the OP are a matter of loading and configuring packages.

People who aren't regular emacs users tend not to understand it and are not reliable reporters about the editor or its community.