If you are building an engine today (~2023), Professionals are not building Hydraulic FLat Tappet camshaft engines? Don't try?

I think spring pressure, aggressiveness of the cam, break-in procedure (including lubricants), and quality of cam manufacture all play a part in FT cams and how long they live. To date, I have not lost a FT cam, but I am slowly going roller in most of what I own.