Sideloading is actually two separate issues: 1. Should Apple allow iPhone users to build their own software (or third-party open source software) and deploy it

Sideloading is actually two separate issues: 1. Should Apple allow iPhone users to build their own software (or third-party open source software) and deploy it to their iPhones? The answer here is a resounding yes; in fact it's already possible! Just register a developer account, and you can sign your own apps and deploy them to your phone. 2. Should Apple allow predatory 3rd party vendors (Google, Meta, TikTok, spyware developers, etc.) to circumvent the AppStore review process and deploy their opaque blobs to other people's iPhones? The answer here should be no in my opinion. (unless iOS gets rewritten in Rust with a capability-based ultrasecure watertight microkernel, where accessing dangerous "private" APIs and thus privacy violations are provably impossible - in this hypothetical utopic vision the AppStore review process would become moot from a security point of view, although there are other aspects of the review process that cannot be formalized that easily, c.f. "I know it when I see it") (of course, the predatory 3rd party vendors love it when people conflate the two issues)