Take a full-suspension carbon mtb with electric shifting, hydraulic brakes, tubeless tyres etc and compare it to 1895 Singer safety bike. A lot has changed! But of course with more simple designs there aren’t that many bits to develop, yet probably every part has changed to some extent since those times.
I hope this is not Finland like the name Sisu would suggest as it’s very much forbidden to make any live fires at the moment - wildfire warning is set for the whole country. People are ignoring the warnings and starting forests fires with careless campfires, cigarette butts and such. :(