I like the emergence of alternative frontends to popular services (twitter, instagram, youtube). It’s the data that users created that is interesting, not how the service envisions it’s representation.
There is some risk: where it is not a platform offered frontend (as in old.reddit.com), these are essentially untrusted proxies that could give you any kind of payload.
The potential benefits are: faster rendering due to less javascript heavy sites, no cookie banners, no recaptchas, less login nags (as in the occasional instagram tap).
One extension that offers these redirects is https://github.com/SimonBrazell/privacy-redirect … I wrote up the steps necessary at Howto use any Addon in Firefox Nightly for Android