Near where I worked some poor schmuck leveled his garage. The fire chief told me he was trying to fill a 20lb propane bottle with compressed air...
I dunno if he was trying to use it with a compressor, or as a tire-caddy, if it partly full, rusted out, or if he accidently filled the wrong one, but it made a very big mess...
Mostly tho, the issue is going to be that the tanks that are easily available are not the ones still in good shape, because you can take them back and get more propane, but the tanks that the propane guy won't refill anymore because they are so scary looking he doesn't even want to stand near them. These things sit on the wet ground, in all the caustic grud from the gas grill, and the bottom rots to heck. The only saving grace is it rots on the outside..
>the receiver becomes a sales tool.
Sadly, yes...
And a little bit of "we have always done it that way"
We have flash water heaters, we should have flash air compressors....
Triplex, variable speed drive.....
Probably can't make them in china for $25 tho....