I have both the 2020 2-in-1 XPS 13 (32GB, core I-10) and I love it because it's a beautiful 2-in-1, but yes, camera and fingerprint scanner don't work at all, but only in the 2-in-1 version -- works great in the laptop version, which seems to have a different camera. Wireless works great, though, as does the trackpad. (Kubuntu 19.10, not LTS -- LTS didn't work very well at all for me.)

I also have a lower-spec'ed 2020 XPS 13 laptop (8GB, core I-10) that works perfectly across the board (except for the fingerprint scanner, which I wouldn't use anyway.)

I love the hardware on both. Absolutely love it -- more than my Macbook Air; no sharp edge where I rest my wrists, touch screen, phenomenal screen (4k, which is higher than Retina, or 1080p, which gives better battery life) etc. The 2-in-1 has a taller screen shape, so you can fit more lines in your coding windows.

If you care about camera, get the laptop. It's also a little bit cheaper -- I got it for about $950 from Costco. The only thing I don't like about the laptop is that the screen doesn't tilt all the way back. The keyboard is better on the laptop instead of the 2-in-1 as well -- more depth of travel, and the Delete key is in the right place instead of offset by the fingerprint/power sensor as on the 2-in-1.

I love the new Dell XPS 13 and think both the 2-in-1 and the laptop are better pieces of hardware than the Macbook Air, and I prefer the new Kubuntu 19.04 over Mac OSX as well. (I don't have a MBP so can't compare to the Pro.)

I felt the same way as you about my 2015 13” so I reformatted the drive with apfs and did a fresh install of Mojave. Got a ton of storage back and it runs like a new machine. One of the best things I’ve ever done.