Hi,

i think it depends on the job. I for example do a lot
of 3D printing for clients at work and often do not
need to much filleting, because the 3D printer does
not produce such sharp edges on the printed models.

For a kit bash library it might be o.k. However once
you export as mesh it may become a bit heavy if
you fillet all details and later don't see it in renderings,
because of lack of close-up's.

And like already mentioned, there are also rounding
edges shaders available for certain DCC apps.

Regards
Stefan