Yep. The initial idea was to have a cheap SBC, that you could give to an entire classroom without being worried too much if some of them break. 35€ are not exactly cheap, but doable. 80-90€ is simply not viable for that purpose anymore.

At the same time, for more serious projects, it's lacking too many features like sata, pcie, etc., etc.

I feel like RPi is coasting on momentum, without a clear direction.

I'd rather have x86 tbh. Thanks for letting me know these exist.

A refurbished thin client from eBay. Or a refubed sff/usff.
They are pretty much the same price these days, and come with a case/PSU.
If you don't need the GPIO and special connectors that a raspberry pi has, sff/usff is going to be cheaper, has upgradeable ram&sata and some have pcie3.0 slot.
Running pihole (let's be honest, a huge reason people buy a pi)? Get a usff/sff, slap an SSD (probably the cost of a raspberry pi case/PSU/SD-card) in there and an intel i340-t4 4port NIC (this is extra. Can just use the onboard NIC), and install proxmox. Then run pihole in a VM. And now you have spare capacity to run a whole bunch of other fun things, with the safety net of snapshots and backups so if you mess up a config you can just roll another VM.

I was in the market for something low budget with two nics for a local firewall. Since this gave me a nice discount on top, I ordered a zimaboard now as it's pretty much exactly what I need. Thanks for the tip

Even the recommended 5V3A supply for the Pi4 is non-standard and requires you to either buy the official power brick or wade through a sea of sketchy Chinese knockoffs that may or may not deliver their rated power. I don't understand why they haven't explored alternative connectors or slapped a voltage regulator on the board in order to use a 12V supply. 5V5A USB is just ridiculous. USB only makes sense when you're using universal requirements, but this might as well be a barrel connector as you can't use any normal USB charger with it.