It would be great to still file bugreports for anything you think could be improved in e.g. a distribution. I help out with Mageia. There's often various things which are simply overlooked or people aren't aware of. Obviously your bugreport could be ignored or not dealt with, but it doesn't have to be. It's a small investment to hopefully (years later) have less things to deal with.
I do the same when packaging upstream software. Sometimes there are build problems due to configure(.ac) not checking for dependencies properly. I'll then open a bugreport that these checks should be added. All that small stuff helps quite a bit.
A lot of the problems we hit were due to having to support many versions of many distros, not so much a particular bug in one distro. That said, we filed bugs, provided patches, and even drafted XDG specs for some of the issues we were dealing with.
The problem is, even if we filed a bug report with a patch for a 3.0 release of some distro, and it was fixed in 3.1, we still had to support 3.0. That meant code that worked with both the buggy 3.0, and the fixed 3.1. That's not a big deal when isolated to one distro or one component, but we're talking all the major distros, various third-party libraries, etc.
We may have been a bit nuts, trying to keep such a wide variety of environments supported, but that said, we also got really good at it, and it meant we didn't have to force customers to make changes to their system that they didn't want to make. The products ran on distros so old that they still only shipped GTK 1.2 (though we eventually finally walled off some of the older ones when we started supporting only 64-bit processors).
I do the same when packaging upstream software. Sometimes there are build problems due to configure(.ac) not checking for dependencies properly. I'll then open a bugreport that these checks should be added. All that small stuff helps quite a bit.