Helium has been increasing in price at about 8% per annum compared with 2% for inflation, so it seems like a strong case that we are actually running out of easily accessible, cheap helium access. Since 2006 there have been 4 global supply disruptions and it’s now believed to be a regular occurrence vs not really happening before.
It only seems like nothing happens if you stop paying attention.
Helium isn't a good example. Prices were artificially low for a long time due to the US federal government gradually selling off their strategic reserve. As a scuba diver it was great but we knew it couldn't last.
As long as we're still throwing away the lion's share of what comes out of the ground, it seems easy to dismiss the problem. Perhaps we were just paying a subsidized price and now the market is getting involved?