G500 before or after the year 2000?

Hello together, I love the topic for a long time, but now it’s clear, I want a G500. Of course, I’ve already searched half the internet for tips and found a lot of helpful here. I still have a few questions, because I couldn’t find a final answer. Especially at the year of construction I think about it. The models >2000 have more electronics, which supposedly and logically can lead to more problems. But I don’t have any real reports about these Problems found, make the models with ESP etc. really problems and which are these? Rust is apparently a topic for everyone, is it really the case that the models from 1998-2000 were better? How “bad” is the air conditioning in the models before 2000 compared? Are there otherwise big differences between before and after 2000? I could also imagine a vehicle with 200,000km, if everything is in good condition and cleanly maintained. I think engine and transmission also keep much more from and with a vehicle with a higher running line, many other maintenances are possible, which are still to be done with one with 100,000km, or what do you think? Basically, both variants would be in question for me, whereby I find the old square dashboard even almost more beautiful. Many questions … and thank you for your help … Christian