Earlier quoted context omitted.
Exactly, I'm a mechanical engineer and I still have tools given to me by my machinist great uncle from WWII that are not only functional, they're identical to a new tool I'd buy today for that purpose, from the same manufacturer. This is the difference the OP was highlighting
Are those tools functional? Have you ever checked? I'm not sure what tools you are talking about, but likely some of them are measurement tools and they can seem to work perfect while giving the wrong measurement. Other might be cutting tools that cut, but they are a bit dull and if you don't know how to check you won't realize the cuts are not as good as new anymore (or maybe you have sharpened them and they now cut…
They are things like: -Measurement tools that can be checked easily against Measurement standards (its taught as good practice to check this anyway each use) -files -transfer punches -feeler gages (again, easily checked) -bore gages -gage pins - 123 blocks - on and on...