I'm sure a lot of people tried 1 model/harness and stuck with it without really comparing (same way I haven't changed my IDE and my terminal for the past 10 years), and eventually will try a Chinese model and be blown away.
I was discussing with a coworker yesterday who pays $200/month for cursor, has never tried any other harness and mostly use grok, in rare occasions opus 5.5. He seems to be regularly out of tokens. I told him I exclusively use DS 4.1 flash with opencode, spend like 100-150M tokens a day including cache and it oneshots all my tasks without issues. I barely reach 20% of my $10 sub at the end of the month. From his look I think he didn't believe me.