I play a lot of my A tunes crossed AEAE and while there are a lot of variables that can make that difficult such as the height of the bridge, the biggest factor is the type of stings you have. Many will pop of you try to tune the D string up to E. I use Red label and or Prelude and don’t have any issues ever.
Older strings are more vulnerable to snapping as you know. My question is more one of whether the fiddle likes the new tuning and do you put it back into standard when done for the day so it remembers its normal shape. There are lots of great songs in alternative tuning, for sure and I’ll be playing them. I have a cheaper used fiddle that I will be doing the alternate tunings on when I just love a tune and must learn it.