How do I play sounds with this? I see no jack for speakers or headphones. I assume one could have sound over HDMI but monitors with built-in speakers are not very common.
A super-cheap USB soundcard is another option albeit an ugly one. But I do agree it's a shame they couldn't squeeze an audio output into the design somewhere.
I noticed that. Audio has to come from the HDMI connection or from Bluetooth, either of which will produce better sound than the standard Pi audio jack. I imagine they see this being used with a TV, much like the old classic 8-bit consoles.
Monitors with 3.5mm outputs however are not that rare.
RPi4 has BT.
There are Bluetooth "DACs" that have tube-based amplifiers so you can really go nuts with a DAC that costs like 5 times the cost of the RPi 400.