Well, you decide what to spend your money on, but I, for one, have to disagree with your approach. Rosetta 1 was released in 2006 with macOS Tiger and officially discontinued in 2011 with macOS Lion (thought you could still run versions of the OS for a while without upgrading to Lion). Given that Intel versions of Macs can still be bought today, it is very likely that you will be able too run software that has not been fully ported to Apple Silicon for several years, not to mention that DxO and others would obviously move to update the application if Apple discontinued Rosetta 2 support.
Second, you’re missing out on tons of cool stuff! I work a great deal with DeepPRIME; on my quad-core iMac i7 at 4 Ghz, processing a single image (DeepPRRIME plus all edits) took an average of around 45 seconds per image. No big deal, you say, but when you’re running a batch of 100 or so photos, it starts to count. On my 14" MacBook Pro (M1 Max with 32 GPU cores), the average drops to under 5 seconds per image! Would I want to forego this leap in performance just because I may be forced to upgrade to a new version of PhotoLab in the next five years or so? Certainly not!
Third, DxO has limited developer resources. I would much rather see them spend these on adding features to PhotoLab than to port insignificant parts of the program to Apple Silicon. They recently gave us DeepPRIME/PureRAW and Fujifilm X-TRANS support—as far as I’m concerned, they can run the UI on Rosetta 2 for as long as Apple supports it.
But as I said, you choose to spend your money the way you want to. I just think it’s a pity that you will be missing out on so much.