What I was getting at is that the CFM has been around for quite a few decades and has proven very reliable in service.All my Airbus experience is on the “A320” ( what my license says ) , but most of my trips were on the A319/321.
I prefer the A319 ( better climb, high altitude cruise ceiling when heavy ).
All 319 will be retired soon where I work.
All CFM but obviously more powerful engines on the A321.
So far, I can’t recall a single problem with the engines, nothing.
Some very minor APU problems ( failed to start ) , maybe, 3 time over 24 years.
AFAIK the alternative IAE engine is reliable as well, although not nearly as many V2500s are in service.
OTOH, the current Pratt GTF engine has proven troublesome in service.
There are some engines that have simply not worked out as well as others in line service.