Just imagine the world in a decade or two: it'll be one of mandatory secure boot, remote attestation, and centralized app store distribution. Regular people just installing software? That's unthinkable. It'll put themselves and others at risk. Even browser extensions will be tightly restricted. If you want to write software, you'll have to get a developer's license and accreditation from an industry-wide professional association, who can remove your accreditation (and ability to get a run-your-own-code certificate) for any reason. Sure, you can find some 2019 laptop and run Linux on it, but your ISP won't forward your packets if they're not signed by a trusted kernel. Good luck running some tin-pot mesh network in whatever tiny sliver of unlicensed spectrum remains.
Think this scenario is unlikely? I wouldn't be so sure. All the bits of technical infrastructure we need for this dystopia already exist in one form or another. There's also significant social and political pressure to rein in the internet --- pick your favorite pretext --- and it's inevitable that platform vendors will respond to this pressure. I've heard a disturbing amount of talk lately of the need for centralized control in order to combat "disinformation", for example. Already, we've lost an amazing amount of ground on software freedom relative to what we had ten or fifteen years ago. Most people already use a primary computer that they can neither control nor inspect --- and they like it.
Mark my words: in ten or twenty years, policymakers and very serious establishment types will regard letting regular people just make their own software and connecting it to the public internet as unnecessary, dangerous, and suggestive of some kind of moral fault. It's starting already.