I swear in Legion people argued titanforged is not that common, it's just perception because we only remember the crazy titanforges...
Well I'm still wearing 390 + socket hc gloves that I got early on and couldn't replace all this time in Uldir, because the titanforge was so high. Only 1 big item like that on my main, but I was never super lucky to be decked in titanforges in every slot. I feel in Legion a lot of my titanforges had something to do with weekly m+ chest having +20 ilvl over dungeon drops as far as I remember, and now it's only +10 (+15 on azerite but those don't "forge" by default). So yeah lots of my alts ran around in these "mythic 15 titanforged" items due to how weekly reward was auto-titanforged.
Across my few alts I've seen quite a decent amount of titanforges, however often they're "wasted" titanforges for example 340 emissary item upgrading to 360 but I already have a 370 item. Nevertheless it still happens.