The W123 is a space ship compared to a Model T.
With those fancy disc brakes and ABS.
The W211's are a fine car in 10 years they will have cheap programs you can plug into your laptop and read the codes. Their are companies that remain electronic parts for MB's anyway. Computers are just like EFI, ABS, independent suspension ect. What is cutting edge one day is childs play the next.
If I had the money (one day I will) I would be enjoying not having to work on my nice new CDI. Then after 5-7 years I'll trade it on a new one. I'm not saying the old MB's aren't great I love playing with them. But having a nice daily driver tht starts is a big plus.