It feels like there is a wide open opportunity for some new OS's to enter the mainstream marketplace. I see nothing but dissatisfaction with the incumbents.
There's so much lock-in/captive-audience on these platforms I don't see this happening with mobile phones as they exist today. The only thing that will crack it is the "Next Big Thing"™, and who knows what/when that will be (AR glasses? Brain chips? Some AI wearable?)?
I want what you say to be true, but realistically it's not because of the "security" features available to app developers, and the fact that so many companies (even government!) have moved to mandatory apps. I don't know how we ever get past that with a new OS.
Will the new OSs be able overcome Apple and Google lobbies to restrict banking apps to "secure" (i.e. under their control) devices?
There are android distributions like Graphene OS and LineageOS that are completely open. The problem is application developers that specifically restrict their apps to only run on google/apple certified hard-/software
In order to enter the mainstream market and challenge the consumer OS duopolies, a new OS needs at least two things:
1. Retail presence
2. A large advertising budget
This is why it's so difficult to challenge the existing duopolies on desktop and mobile. If a consumer can't walk into a retail store, see a device on the showroom floor with the new OS installed by default, and buy a device with the new OS installed by default, then the new OS has zero chance of becoming mainstream.
Among other reasons, this is why Linux has failed to go mainstream. Linux has no retail presence, and it's not advertising to consumers.
We have other mobile OSes, even ones that support Android apps like Jolla and PostmarketOS. People don't use them.
We still have problems with websites only working on Chrome, moving to a new - or grow an already existing one - open mobile ecosystem in 2026 and beyond it's going to be much more difficult than the Year of Desktop Linux, unfortunately :(