As long as they are doing what they need to be doing, how much electricity savings are you going to get and is it worth the PITA to change them. I have a system with a 15+ year old 12 GB drive in it. I have a much lower wattage appliance to replace it, and have for several months now. I just haven't had the time to swap it out.
You could just replace them with a few 8GB memory sticks that take much less resources to run, make less noise, have no moving parts and are cheap to procure. Seriously, anything under 1TB is a joke these days. Wasting resources on running a 4.3GB array is just silly and if it's done for silliness' sake, that's a different matter, but in practical terms it's really a joke.
Bush the Lesser was an idiot.
You mean he got better?
Remember, people are uneasy about using something without a decent level of understanding about it
You mean like cell phones, fax machines, computers, photography, and other things that an average person has no clue about how they work? Seriously, people are very easy about using something without even a rudimentary understanding of the underlying technology. People are uneasy about using new things. Once the practice and culture of using a new thing is established people by and large do not bother about knowing how it works. This is not my opinion, it's a fact. Bitcoin is no different than any other currency that is not backed by anything other than the respective issuer's reputation. US dollar is no longer backed by gold, so its value is completely up to the people who believe in it.
Computers are unreliable, but humans are even more unreliable. Any system which depends on human reliability is unreliable. -- Gilb