DavecUK I changed to a mobile phone for my review photos and videos many years ago, because it was just so much easier and simpler to do it and transfer the images and videos.
I suspect a lot depends on what you’re aiming for. A pretty high proportion of so many, ummm… reviews is as much or more about entertainment than information/education. And in that environment, production values are more important. If people go to the review for information/education, and that is where yours truly excel, then (IMHO of course) the mobile phone is quite simply good enough. What am I REALLY looking for, and/or care about? Professional lighting, HDR colour, 4k ….. or rock solid actual content.
With some reviews, even for me, probably entertainment, but when I’m after actual meat and potatoes, i don’t really care about the colour of the candles on the table. 😀
Has your moile phone ever detracted from the standard of the info? Not in my opinion.
More broadly, can I remember ever cutting a video I was watching short because vid quality isn’t top draw? Nope. I have dumped a few, and I don’t mean yours, for lousy sound. For anyone setting up a studio, my suggestion for a limited budget would be get the sound right before spending a fortune on fancy camera gear or lenses. A mobile phone will do a perfectly acceptable job. A tad below perfect image quality is fine, but lousy sound …. that can be a deal-killer or me.