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Baseline RAM Pi are still magnitudes cheaper, its a moot/niche above 2GB for most makers. Pi doesn't have to cater to lite servers only...

Gotta admit that Pi foundation never cared about batteries, especially since it's common with makers, audio removal etc...

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Pi4 2GB with power source, SD card, case, fan is like $100. You can have nice Atom MiniPC for that. Or old PC from ebay...

But these are used, cheap new Atom miniPC doesn't have GPIO, and brand new Atom SBCs with GPIO are more $$$ with the same SoC compared to miniPC since they aren't mass produced. A used Pi with sdcard/case/fan is much less than $40.

USB GPIO dongles are a cheap addon to any x86 PC, e.g. "Adafruit General Purpose USB to GPIO" at https://www.adafruit.com/product/2264

These tend to have buffer underrun issues causing latency in the order of seconds, requiring deeper knowledge in the embedded field to mitigate.

Most educational content that involve the Pi tend to use system GPIO libraries and integration, making other SBCs or USB expansion boards difficult to use for newcomers. The Pi is a platform other than the hardware, their forum should be more welcoming though.

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