People cannot deal with today's complexity.

I have seen the argument: all my games in Steam, all my movies in Netflix, all my videos on YouTube, etc.

To have to pick and choose between different apps makes everything more complex, and it is too much for the average user that has other things to worry about.

All this is really bad for capitalism, as it creates monopolies that no competition can fight against. It concentrates power and eliminates competition.

E-mail is still alive because it is the one place that one can get registration messages, invoices, goverment communications, etc. It is based on a standard so I can use my own provider but interact with all the rest of the world without caring what do they use. This is the future of the web.

For example, I should be able to download any movie app an see all the movies from Sony Pictures and Disney, and Ghibli, and all of them. Once purchased, I should be able to see all of them in the same app. The standard offers interfaces so I can choose one provider that connects to the world. Prices are the same on all apps, but they can differentiate themselves thru localization, recommendations, etc. This is feasible but it requires strong regulatory intervention as current monopolies are the best option to maximize profit and eliminate competition.

Ads are also perfectly fine to finance on-line videos. It is the tracking and invasive privacy practices what is dystopian and horrifying. Most of the revenue of YouTubers comes anyway by paying users (Patreon, etc.) or external traditional ads (NordVPN, SkillShare, etc.) that still ask for metrics for the channel but are not individually targeted.

Standards over platforms is the only possible future, but it will require to topple down the current status quo and that is what is difficult to do.

This. Email and text is one of those things were you are not stuck to a single provider. Anything closed and proprietary is a problem. I'd say this is also the case for banking. Banks often require Google Play or iOS, severely constraining the user. Governments somehow need to put a stop to this, especially in the EU where we are becoming a US colony due to all our IT being in the hands of US companies. We need to take back control!