I think most of the cheap SFP+ cards from ebay have Windows drivers, but definitely do some googling of each model to be certain.
Technically, and mathematically, yes. That said, in my 20 years in enterprise networking, those devices are amongst the most bomb-proof gear I've used. I think I had 1 fail at some point. I've had some failures with them becoming unplugged (usually a simple barrel DC power plug)... I have a few in production that were made when I was still in school. Allied Telesis (formerly Allied Telesyn) is a well-known brand in that market.I read that using media converters drastically increases risk of failure (more devices in the path = more devices/power supplies to fail),