The D5300 is pretty old, I had one in 2013-2014, coming from a D3200.
> - I compared on my 27" screen, no difference, even in low-light scenarios and at different ISOs
This might be the main difference between us, I usually do prints in A3+ sizes and the differences in picture quality between a smartphone and my cameras are very noticeable.
The A72 and D5500 have the same used price.
Again, I understand the price point but it's an oddball comparison. Perhaps a comparison between the A72 and a Fujifilm X-E2 could tell us more but I don't have either devices to directly compare myself :/
Because people who find their 2022 smartphone outperforming their 2015 DSLR don't upgrade to a 2022 DSLR.
Did you do a real image diff on the same setup? I doubt it. Phone cameras have come a long, long way but a lot of the advances are through "smoothing" things out through software.
I've done 6 years of professional photography to pay for college. Portrait shoots, weddings, even produced videos, ads, festivals, wildlife documentaries. I worked on Nikon D4S fullframes. How is my age relevant ?
My point is, professionals can always squeeze extra juice of the hardware, but the average consumer does not.
But once you take RAW photos and hit the Auto button in Lightroom, the Pixel doesn't hold a chance against the D5300.
Fuji uses the same sensors on many cameras, you can get an xt-2 or xe-3 for much cheaper, with the same sensor