Reminds me of Ford Vs Chevy. All the major brands get you where you want to go. Nikon and Canon both yield excellent results. Most brands try to maintain some kind of backward compatibility with lenses because it helps sell the new generation of bodies.

Loyalists are almost never familiar with the other brands and not qualified to make fair comparisons.

I’m glad you are happy with Nikon. I’m happy with Canon. If I went with Nikon, my pictures would probably look the same and I’d still be happy.

I have shot Nikon since 1971. The oldest lens I own is a F mount 13.5cm 3.5 Nikkor c.1963. Which I purchased used as my first 135mm. My first 50mm 1.4 was also purchased used - made in 1969. They mount and operate on my Z9. Kinda clunky but works correctly. And on my Z7, Z6, D850, D200, and my F. Most of my AF, AF D and previous lenses will mount and operate manually on the F. Even the old F mount intrusive fisheyes will (mostly) mount and operate properly on the Z camera’s. I’m annoyed that my screw AF lenses don’t autofocus on the Z series with the FTZ. But otherwise they work fine.

During the same time period Canon has had the following lens mounts:

1959 R
1964 FL
1971 FD
1987 EF
2003 EF-S (EF compatible)
2012 EF-M
2018 RF (EF lenses can be adapted for the the R camera’s.).

I went with Nikon originally because the Canon FL to FD mount change seemingly left the FL user base abandoned. More specifically, the FD used market was non-existent.

That was then. To give Canon it’s due were I to have started serious photography in 1991 or later I might have gone with them. They’re offerings have always been impressive.