rarity of pipe bubblers?

yeah there are show cases full of em

 

True. Most of the headie pieces I've seen, IRL or on the net, are bubblers, not bongs. That kind of surprises me.
I think that as glass has become a bigger deal bubblers have gotten more common. I'm not a long time toker so my only reference for that would be 1-2 convos with my mom and an article in High Times about how the glass industry is a lot younger than the stoner culture in general.
To any older members: How have pipes changed in the last few decades? Was glass really all that rare in the past?

 

I wouldn't think that bubbler's are hard to come buy I goto the same shop all the time. He's got a large selection. If you live in Los Angeles check out Mike's on Hollywood. That's where I got all my pipes from. They have glass, metal, bubblers, multi chambered and my favorite my single hit cigarette pipe w/ wood case. Sadly I moved last month now I got to find somewhere in San Jose