Even without fans installed on the shroud, I feel that having a solid PSU shroud could help move front intake fans over the main components better. With my case, there is a lot of open space by the PSU so it moves around more than if there was a shroud right there
That is just how old cases did it. No one thought to hide the PSU back then as why? You can't see it through the solid side panel. It was only once tempered glass sides were a thing that hiding it and cables was even a thought. Cases when my black one above was made had plexi glass windows - not that it had one. They scratched too easily and looked as cheap as they were.
Air flow was not even on list of things they thought of beyond having space for intake fans, if you lucky. Most had a stack of hdd cages at front and didn't let any air in.
One of my ancient cases tried to do both, it had a stack of hdd cages at front and behind them the intake fans
techgage.com
That one was different, it had side vents for the front intake fans - I used that case for about 8 years,
having a good case has been a priority for me ever since getting a Lian LI case in 2005... spoiled me.
My shroud is really just a shelf with an open front, there is nothing between the front fans and the PSU, The top of the shroud isn't solid, I can either have the fan mounting brackets or replace them with a mesh bracket to fill in the gap
A 3rd fan wouldn't help at rear, its blocked by the PSU. It looks like back of gpu is dusty. Guess I fix that next time I take sides off again.
You could remove the entire shelf if you wanted, there are diagrams showing a 360mm radiator mounted there instead. and a 240 under it, but then motherboard clearance becomes a problem. and water flow issues.
There probably are cases out there still with metal side panels but you would have to search for them, as most follow trends. Or just get a black case as most of them have dark tinted glass and you can't see in anyway. Seems self defeating to me.
I don't want a shoebox PC as I like my PC running cool and cramming everything into a tiny box is just asking for heat. Even if it looks cool.
something will pop into my head eventually.
Or you will go to do something and realise you forgot to install it.
I cheated and wrote a list of the programs I had installed, and just made sure I had them.
There are some things I didn't bother with on this PC, as they still on my old one. I clearly don't need them since its 4 months since I used it.