I just failed for the third time and thought I would give a bit of a review.

First time was clean install and default settings -> immediately overrun by biters due to smelting pollution
Second time, I hid my initial base in a dense forest -> got overrun by medium biters after a couple of hours ...

Any chance for a port to v15 ?

I have Equalizer Chest in my 'defaul' mod list, and I would really miss it. Nothing really does the same as your mod does.

Moffmaster

That's a very nice idea!

I imagine flow cells will be better at storing large amounts of power in tanks, though their peak-power throughput is limited by the number of actual cells. So they would be a good nighttime storage solution for a solar-based energy system.

I just gave it a a test, and it works exactly like what I asked for.

I still check the inventory for trash too often (out of habbit, I suppse), but it does make things much less of a hassle, especially for bigger mods.

So thank you a thousand times for doing this mod! I'm very grateful! I put it ...

Honestly, it doesn't really matter if it is #types or #types +1. Building it so that it notices the new item you are about to pick up and add a slot for it would be nice, but not strictly necessary for the basic concept. Usually, you would have a few free slots to put stuff you want to pick up.

The ...

I meant more from a gameplay perspective, than a realism one.

With the mod, water has so much thermal energy capacity that it takes two minutes or so until a boiler has reached max temperature. So when setting up a new power plant, you have to wait rather long before it produces meaningful power ...

There already is a mod called increased water heat capacity that seems to solve the problem. My only issue would be that it may be a bit too generous (engines use almost no water). But it certainly does away with the ridiculous plumbing you had to do to feed the boilers.

Moffmaster

This is, I think a very simple to implement mod. Unfortunately, it is still above my own understanding of programming.

For me, one of the most annyoing things in factorio is to deal with random 'trash' items that you tend to pick up. Like a piece of copper wire, an old wooden pole, an iron rod, an ...