I've got 4 nailers I think.

An old Devilbiss that shoots trim on ok with short pins. It sometimes
struggles with real hardwoods. I've had it for about 23-24 years.

A Hitachi that shoots 2 inch trim pins through just about anything. I have
to keep it adjusted for every job because sometimes it will shoot a pin all
the way through... a hard dry 1x2 and a 3/4 piece of plywood. LOL. AS a
trim nailer goes its pretty darn good. I've had it for about 18-19 years.

I've got a Rigid framing nailer that has built two small utility buildings
and set a set stairs. I've had it for 8-9 years. Its ok. If I try to toe
nail with it sometimes the nail goes flying. It works fine, but I see
sparks every once in a while, and it doesn't feed the last couple nails of a
strip very well. It still works just fine. I also use it for ring nail
strips for plywood sheeting and things like that. Its really handy for
building stick frame and plywood utility shelves except its kind of a pain
to swap back and forth between sheeting nails and framing nails so....

I bought a Porter Cable framing nailer that shoots the same round head
strips as the Rigid. It doesnt spark. Toe nails go where they are
pointed. Its just as awkward to swap from framing to sheeting and back to
framing nails, but thats the reason I bought it. Put framing nails in one
and put sheeting nails in the other. A set of crude stick frame and plywood
shelves goes up fast with two guns. Real fast. I've had it for about a
year. Is it bullet proof. I have no idea. I probably won't ever use it
professionally. I expect it would easily last through a couple decent size
house builds though. Its not a Senco, but it doesn't cost like one either.
In fact I think it was quite a bit cheaper than the Rigid even. It doesn't
feel like a 20 year professional tool, but I bet it will be just fine as a
20 year + occasional use tool.