So at the end I took the risk, bought the Surface Laptop and tried Unreal Engine on it. The result is that it runs fine. With mobile rendering preview it runs stable capped 60 FPS in the 3rd person template project and that is all that I need.
Yes, that is the one I mentioned in my post. It looks alright, I am just checking if I find any confirmation.
I have always been a fan of Microsoft hardware, I currently own Surface 6 and am quite happy with it. However, due to circumstances, I will need to present simple project in Unreal Engine 5 in 6 weeks time and have no portable machine to run it on. So I am thinking about buying a new laptop and preferably it would be the recently released Surface Laptop with Snapdragon X Elite (X1E-78-100). I have found one YouTube video showing Unreal Engine Editor presumably running on the machine with 30 FPS. I know that the hardware is not a gaming one and I don't plan to use it like it but I would love to use it for my UE presentation. Does someone here have a Snapdragon X Elite machine who can confirm that Unreal Engine 5 is usable on it for simple projects?
This has a side effect of the people who went through the full game development cycle and can help to improve the process of developing of future games with actions based on their experience do not stay in the industry and thus the industry is bound to repeat the same mistakes again and again. I mean, I started working in the gaming 22 years ago, worked there for 7 years, then took 12 years of break elsewhere and now I am back for 3 years. After I returned I was surprised how almost nothing changed. It is still the demo-to-demo sprinting without proper planning or building the technical layers in advance. So the publishers/management is getting more or less faked demos and are always surprised that at some point they get a very badly made piece of software full of bugs and architectural flaws.
I am afraid there is nothing like minimalism when we talk about mobile phones. It is basically all or nothing. I mean, it seems like everybody only thinks about social media apps but I don't care about social media, I want my phone to run apps that control my smart home appliances, contain my public transport tickets, my ID card, my air tickets and other such convenient stuff. Most of these apps basically only exist for iOS or Android and some of them only work when downloaded from the official stores. So any phone achieving minimalism by using custom OS is just unusable for me and is equal to a dumb phone.
Unihertz is not officially supported but you can get LineageOS on it using GSI. I followed this how to: https://www.reddit.com/r/unihertz/comments/16sviga/unihertz_jelly_star_running_great_with_lineageos/
Only recently I started to use Unihertz Jelly Star. I flashed the stock Android 13 with Lineage OS 20.0 and I am very satisfied. Of course, it is the other extreme, as it is really very small but I am able to use it quite well for all I need.