There was a period between about 2011 and 2014 when the fastest way to mine bitcoin was on a GPU and it did cause a shortage in cards:

https://www.fool.com/investing/general/2013/12/11/amds-graph...

Ah yes, those days, I mined two bitcoins and sold them for $100, then got bored...

Nobody cares which coin of the week is used, it is time to get rid of the crypto garbage.

there is no "eventual E-Waste issue" .. there has been an E-Waste issue for 20+ years. Ridiculous amounts of fresh water, electricity, transport fuel and other non-renewables have been poured into the PC industry since most here were born. The damage that this does is proportional to a few things, like the source of the electricity and the containment of the material and "end of life" .. Consumer electronics have been living way past their means for decades, but in the age of COMDEX Las Vegas, as long as the quarterly results match, few in a decision-making role actually care.

Do bitcoin ASICs compete for the same limited IC foundry space?

Antminer S19 uses a 7nm process, so yes.