I haven't bought a modual in 35 ish years. The last one I used was I believe the Isle of Dread back in like 1982?.
I've always used homebrew adventures and been VERY sucsessful.
I just downloaded Petty Gods for free from RPG Now and it was amazing(for FREE I can't recommend it enuf!!!) It started me thinking. The state of the art in gaming online is so high these days that why arn't some of the canned adventures worthwhile. So I bought two.(both print) Am I getting old or have I learned a new trick? Only time will tell.