I miss digging around for obscure tracks (just got a Lucky Man CD in the mail that reminded me of the days when finding an import single could make my week) but you can't blame somebody for changing with the times.
In the early 90s everything was selling the physical product, and the cultish mystique of rare records for the real fans was something bands would cultivate even if mostly for the cred that cool people would supposedly want their esoteric product. Plus many of our heroes were youthful cokeheads up buzzing all night for weeks, assuming that their ability to effortlessly toss off megahits would live forever, so the potential gains in legend and reputation from burying great songs might have seemed worth it.
I was listening to Listen Up and some of the other early Oasis b-sides and a lot of those could have made singles and been better than almost anything they released after 1997, but instead they were burned off fast. A bunch of RPA's b-sides--Country Thing, Precious Stone, Leave Me High, The Miracle--are better than some of his later album tracks, but I guess he was trying to underline his credibility as a solo artist. There was still an argument for it 10 years ago but at this point he's better off saving stuff for albums people are likelier to notice.