Having spent decades carrying budget knives, I've carried a lot of 8Cr13Mov. It felt like a good deal back when Kershaw was still using AUS-6. It's still better than lower members of its series, such as 3Cr13 or 5Cr15. The thing is, it's never been a good steel. It's always been mediocre. It was just good relative to price within the budget market at the time. That was a long time ago.
Sure, Kershaw, CRKT, and others still use 8Cr13Mov and some of those knives have price tags up around the cost of a Tenacious. Meanwhile, the online budget market has exploded. Lots of companies offer Chinese D2 at 8Cr prices with comparable fit and finish. The worst Chinese D2 I've had easily outcuts the best 8Cr13Mov I've had. As far as more stainless options, the list keeps growing. Kizer has Acuto 440 at $20-something and N690 at $50-something. There are Sanrenmu knives in 12C27 around $20 and Ruike knives in 14C28N around $30. While your garden variety 9Cr18Mov is already a step up, Civivi has perfected the heat treatment and puts it in some really nice knives.
Given those other options in 2021, 8Cr13Mov has become increasingly hard to justify at $20-something, let alone $50-something. So unless Spyderco decides to avail themselves of one of those better budget steels, I'd say hold off on the Tenacious. If you really want to explore Spyderco, spend up to a level where the bang better matches the buck.