Cameras from that era might be good during the day, but as soon as it gets dark, you will run into issues.>inb4 EF 50mm f/1.0 and 1/10 handheld at ISO 800
Not only does it cost a lot more than many mirrorless cameras, exposing that long handheld without image stabilisation is next to impossible.>>3752639
Why not both?
There is a significant overlap between the two.
Essentialy a video is a bunch of stills beeing shot in rapid sucession and pretty much any camera since about 2010 does both.
Sure, there are differences and stuff that is only important for one, but not the other, but there is no reason to not do both.