I have run into this kind of person from time to time. Not very often anymore.
I always say “Are you intentionally trying to piss me off and lose my business, or are you just socially clueless?”
This always results in shoe gazing and averted looks and back pedaling. Very rarely an apology.
“ Because I deal only with people who have my best interests in mind, and I like what I’ve already purchased. “
You’ll know when you’ve reached your endgame system when changes sound different but not necessarily better.