Maybe they will, maybe they won't. Right now they don't appear to be moving into that direction – what better opportunity to further lock down things than a big

Maybe they will, maybe they won't. Right now they don't appear to be moving into that direction – what better opportunity to further lock down things than a big architecture change, when you have to rebuild lots and lots of things anyway, when you're transplanting a whole bunch of iOS features (and even whole iOS apps, it seems) to MacOS? But instead they explicitly mentioned virtualization support for Linux. There seem to be no additional measures like Gatekeeper and Notarization. The security measures introduced in Catalina have carefully-placed gaps to not break terminal workflows, and unless I'm mistaken they can be disabled. Notarization is a bit of a mixed bag; I get the security benefits, but it does give them quite a lot of control. I may be totally naive and utterly wrong, but the vibes I get from all of this isn't that Apple is currently pursuing a strategy of forcing MacOS into the iOS mold and turning it into a two-apps-side-by-side, fully locked down, anti-productivity, content consumption and light Excel, iPad-with-permanently-attached-keyboard device. Rather, they seem so be trying to build a nice and coherent user experience across phone, tablet, laptop/desktop on the UX front that works for a wide audience with little customization, and to find a security compromise between hundreds of millions of (potential) users and organizations who need an ecosystem that keeps them as safe as possible vs. developers, researchers etc. who want their systems to be very open and unrestricted and safeguards to be very lax. I imagine it is kinda hard to build a product that serves both of these well while remaining coherent and fun to use. With that in mind, I think they did a decent job at this with Catalina and the lastest iOS. Big Sur seems to be a continuation of that; it remains to be seen what it'll actually be like in the beta, but right now, I'm optimistic.