Why, oh why. I just don’t get to grips with this.
1. Many of the aircraft I'm likely to fly are not kitted out with modern navaids - in theory at the completion of the ppl I'm qualified to set off cross country in them....so I'd like to be comfortable with the lowest common denominator.
2. Even if the kit is fitted, it still might break
In the event of a primary electrical failure then I've got 20-30 mins of standby power before losing everything except A/H, altimeter, airspeed and compass including all the radios. The avionics components themselves are pretty reliable, but it's still more difficult to guarantee power supply. It's not sufficiently unlikely that it's worth betting against is it?
Even if I'm lucky enough never to have anything critical go astray with the equipment, I'm still left with #1 - maybe there will come a point where it is just an intellectual exercise with little practical benefit, but I don't think we are there yet.
A fool with a tool is still a fool....