it does beg the question though - keep BB58 or switch to Pelagos 39? Hmmm...
Personally I would replace it with the Pelagos 39. To me, there's a few differences that warrant the switch. The new T-fit clasp will be a huge benefit when it comes to daily wearability for me. Being titanium it's also gonna feel much more comfortable on wrist since it's so much lighter. I also like the new sunray finished ceramic bezel and dial, will hold up to scratches better than the BB58 for sure.
The one disadvantage I can think of is that damn 21mm lug width. I don't understand what is with Tudor always having to screw up one aspect of a new release that is soo frustratingly simple to get right. Another thing is the increase in price compared to BB58 as well...although that is kinda expected since the Pelagos family has always sat at a higher price point than the Black Bay lineup.