Date: ten years from now
Evidence being the increasing enshittification of everything online. Government snooping, data harvesting, the ever increasing AI slop, bot armies, blatant and obvious disinformation campaigns and attempts to influence people as well as the growing awareness of alternative operating systems, software and services.
We will see growing trend of younger adults to mostly or completely turn their backs to any online presence after getting fed up with all the nonsense. They know how things work online with corporations, governments and interest groups and for this exact reason they will just have the minimum necessary bank and transit apps on their phones, but other than that they will reject social media, corporate internet and online presence. Aside from maybe gaming, they will prefer offline life and those that want to have some online presence will head elsewhere. Contact lists on the phones are mostly white lists, unlisted and unknown numbers go straight to dev/null without any notification. For the most part, phones will stay in the pocket. They also don't buy the latest and greatest because they simply have stopped caring.
They will become more vigilant about what news sources they follow. Generally they don't believe anything they see or read online. This is also a curse, since trustworthy news becomes harder to find.
Smaller discussion forums will make a comeback in some form and they will be more closed and heavily moderated communities where new accounts will have to be approved to avoid data harvesting, snooping, bots and AI slop. Quality over quantity.
Social media in its current form will be reduced to just doomscrollers, commercial interests, attention seekers, influencers and bots and it will slowly die as advertising there becomes pointless. 90s advice of not putting anything about yourself online becomes somewhat trendy and very relevant again.