

There’s more employees than just the border guards themselves. There’s the HR, the IT, Accountants, Legal etc etc. Block all of them. If those services are contracted out, ban their workers as well. Might be a bit troublesome with companies like Amazon or Microsoft, but since you’re banning individual workers rather than whole companies it might work out a little easier.
Make it so the deal is “If you associate with this company and you aren’t a Canadian citizen, you are personally not allowed to enter Canada”
Why would you want to though? I can understand the retro market because there is software like games that either won’t run very well, or won’t run at all on modern hardware. I’m in the market for a ‘powerful’ machine circa 2003-2005 for that exact reason.
When it comes to machines made in 2015? I’m not sure there’s a lot you can run on those machines that you couldn’t on modern hardware, apart from Windows 11.
I guess you could use them for things like media servers, but it would have to be phenomenally cheap, as in cheaper than cheap modern hardware.
Personally, my rule is a 10 year gap is old, a 20 year gap is retro.