The SV08 is marketed as a mass-produced Voron 2.4, with a much lower price and a very quick setup. They even say they donate a small amount to the Voron project for each sale.
Has anyone here bought/tested it? What are your thoughts about it?
Are there some limitations/downsides compared to a Voron?
Is it possible to upgrade it Voron-style (Stealthburner, enclosure etc)?
All of those upgrades are absolutely doable. Given the price of those upgrades, all-in, a Voron will be a better value. Unless you have most of the parts already, anyway.
Although, I wouldn’t bother changing out the board unless you have specific needs. Firmware and config tweaks will take care of most issues I’ve seen with it.
The fan is probably on par with stock ender 3. But always-on.