My daily driver and MTB are certainly modern regarding all the latest tech trends, however my race bike and soon-to-be-upgraded TT bike are still 11sp and mechanical. And I think I may keep it that way specifically for the affordability reason. Lots of good used wheels out there. And Giant still makes rim brake frames, including the Trinity, which I have my eye on for a new rim brake TT rig. Don't wanna get new TT wheels if I don't have to.
I have Di2 12sp and hydro disc on my daily driver (a 2022 TCR Advanced Pro) and I don't intend on regressing with any of that tech. Instead I will wait a while to get my race bike and TT more modern.
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"Your beauty is an aeroplane;
so high, my heart cannot bear the strain." -A.C. Jobim, Triste