I wonder how much outfits like Send Cut Send are eating into 80/20's market share. I know I've used laser cut sheet stock for a few projects that probably would have used aluminium extrusions in the past.
Probably not as much as Chinese extrusions have. You can find some pretty cheap and compatible aluminum extrusion on the internet these days. Ebay used to be the best, but now there are dedicated websites and everything. Extrusions have never been cheaper
I'd love to get some links on those cheaper extrusion websites you're talking about.