I understand the logic behind the first point, but not the second - could you expand? Does it mean you aren't utilising anything that doesn't already have a tra

I understand the logic behind the first point, but not the second - could you expand? Does it mean you aren't utilising anything that doesn't already have a track record of sticking around (choose boring technology + tech that has been around for a while?), or writing it in such a way that it is backwards compatible with the last 25 years worth of OS/CPU Architectures?