It’s not just aeroplanes where the electronics are getting very (excessively?) complex. My glider is getting a new variometer / nav system after the old one broke after 19 years. The new manual is 129 pages of very terse guidance and probably 100 to 200 user-customisable options which can change the look and feel of what is displayed. Getting into a different glider with the same instrument it may seem very different.