I'm locked into 2000's Canon glass like a 1980's flock of seagull's haircut.
Cool thing is, it plays well with 2000's slrs to present day r5' mirrorless with simple adaptors.
I gave my canon D5 MKII to my daughter. I've still got my MKIII and R5. This is plenty of punch for what our skills are.
My uncle from Tx. pulled out his I phone (whatever) and we had a shootout of my daughter at a horse event. I had a 100-400 zoom. He had better AI autoexposure, I had better range but was fighting my skill set to shoot into the sun and get manual shots. The apple thingee was doing composite hdr exposures on the spot as far as I could tell.
In the end, I think he had more useable pics, but I lugged around a ten pound camera and the pride I had set the single exposure shots up myself on the fly!
(okay... he won...)
For newer stuff, a camera guy I know who shoots professionally for DMB and such has a simple sony (about the size of my wallet) and loves it. He was a Nikon guy and dumped the lot for his sony.