Running a Pi4 w 8GB of RAM, and an SSD, using NextPVR, a SiliconDust tuner and ClearQAM cable TV signal. Happy camper, since that allows me to use the little box as a PVR without any issues. Downside is that it's so easy to record everything, so that very quickly you'd need to empty out the SSD, and move to a slower 8TB external drive :-)
Building up my personal classic movie collection this way is easy though :-)
I may just start tinkering with the 64 bit version, if it's a slow week of movies.