I saw some Reddit posts claiming AMD being not optimized for Linux particularly for arch related distros (I use EndeavourOS)

This is literally the other way around.

But in general it depends on the budget. Both Intel and AMD work perfectly on Linux. It’s more about the CPUs themselves. AMD is better in the budget category because of much more capable iGPUs and performance/price ratio but Intel is better in high end because of simply better technological advancement (as long as you can keep the chip cooler than 90°C).

But if it keeps working for a long time, like 6+ years, then I don’t mind investing.

I wouldn’t be so optimistic about modern laptops, especially ones with dedicated GPUs. They don’t live for more than 2-3 years without repairs.

It’s properly open-source that means objectively better than Floorp and it has a neat plugin/theme system.