RealSense looks really interesting, thanks for that pointer @kd0aij . The D415 and D435 cameras look really competitively priced. It’s a pity that Intel doesn’t seem to have updated their old ZR300 SLAM libraries yet for the newer models. From this thread it looks like ORB-SLAM2 library is your only option currently (although I couldn’t find any very good tutorials on getting this to work or even any very clear evidence that anyone had actually gotten this to work).
As to @Eosbandi’s comment - I would actually be interested in indoor usage so ToF would still be interesting to me despite such shortcomings. I’m still kind of surprised that I can’t find any ToF cameras in the hobbyist domain. As I understand it the Xbox One Kinect featured a ToF camera and the whole unit cost just $150 (and dropped to $100 before being discontinued back in 2017). I know Microsoft may have been subsidizing these units but still, this price seems to imply that ToF cameras should be available for a reasonable price but I can’t find anything in the same price bracket as the Kinect.