Both of my daily drivers need premium and it is $3.40 for Top-Tier Premium 93 at Costco in Houston. Not too alarming as I paid nearly $5.00 for it a number of years ago. We've seen three dollar gas prices and worse for the past 20+ years. Although it fluctuates over time, in real terms, the cost of gas hasn't changed all that much.
On my last driving tour in Europe in 2008 I consistently paid $9-10 per gallon for premium there, so while it is high now, it is not historically high even fifteen years later. Gas prices fluctuate with supply and economic activity (and Ukrainian invasions).