This is going to hurt legitimate sideloading way more than actually necessary to reduce scams: - Must enable developer mode -- some apps (e.g., banking apps) will refuse to operate and such when developer mode is on, and so if you depend on such apps, I guess you just can't sideload? - One-day (day!!!) waiting period to activate (one-time) -- the vast majority of people who need to sideload something will probably no…
Enable dev mode, sideload the apk, then disable dev mode. I'd argue that it is poor security practice to keep developer mode enabled long-term on a phone that is used for everyday activities, such as banking.