In my opinion if you're eating more food than your body needs to pack on muscle, you're also going to pack on some fat. Unless you're a super genetic freak or on the juice then there's really nothing you're gonna be able to do about that. You should just be happy that you're getting stronger and making progress in the gym! Who cares if you get a little pudgy?
Depends what your goals are, and who you are as a person.
Granted, allot of the powerlifters won't be as bothered. Getting stronger is likely their main focus rather than looking super cut.
If your doing both though, lifting to be strong and
to look good, then it is a pretty big deal if you start looking fat. in my opinion.
If you look the reverse of what you want
to look like for a year, then whats the point?
Two people I watch on youtube, both natural lifters, and they stay lean all year round.
I've been very afraid of fat gain myself, but what I'm doing now seems to be working. I haven't put any fat on as of yet, I'm confident now I won't get pudgy while doing my bulk.