It sounds like you have a great history with tech, from extensively upgrading your old Amiga 1200 to building your own AMD-powered PCs since the '90s. Your 2014 quad-core build lasted a long time, but upgrading the RAM to 24GB last year was definitely a smart move to handle modern web browsing and video editing. It is impressive how you've kept your machines running so well over the years without needing a heavy gaming setup!