Oh yeah. Basic D&D was the only game I played until the 3rd Edition was released in 2000. That's...woah. That makes it 15 years straight...longer than I've played any other edition. We ran campaigns that started out at 1st level, and lasted well into the low 20th levels, traveling all over The Known World in the process.
I'm not sure I could run a BECM game exclusively nowadays, though. The d20 system is just too elegant to abandon in favor of upside-down armor classes, percentile skill checks, and THAC0. But I would dearly love to see the Mystara campaign get a 5E update. I would finally be able to play my favorite classic monsters and modules easily, with my favorite game rules system.