There are several companies whose business model is physical releases, the big one most people know of is Limited Run Games. Physical isn't going away, at least not entirely. As for the keycard thing on the Switch 2, we'll see how that plays out given all the negative backlash it's gotten. It's one of several reasons I don't want a Switch 2 at the moment.
More power to people who love PC gaming though, even if I don't personally get it.
I played Shinobi just before posting this, finished the first stage and completed the first bonus level. I think it's great and already feels more impressive than any previous 2d Shinobi game I've played.
There's a little more focus on hack n slash combat here than is typical for 2d Shinobi games with flashy combos, dodges, and a cool execution mechanic. You basically have the same move set as Shinobi III but expanded quite a bit.
It has levels, but they have secrets and you can return to them after you've completed them to find hidden items, collectibles, and challenges. I wouldn't call it a metroidvania given the stage by stage structure, just a platformer with secrets in each stage that you likely won't find on your first run through the level or simply won't have the necessary ability to unlock a certain path.
There's a shop with upgrades. You can buy them with money, but you need to find collectibles to make some upgrades available.
Artistically, the game is gorgeous. It gives me Okami vibes. The first bonus stage is a visual treat that you have to see.
My one nitpick is I kind of wish it had a Japanese audio track given how very Japanese it feels but no biggie.
Any way, good to see two iconic ninjas back in classic 2D again. Kind of wish we could get a new Strider game now.