I use Profoto Air Remotes primarily to control my lights but using sync cables can be very helpful too in various settings. This feature is available on the older B2 and why I still use it often!
As a newer Profoto user, I was shocked and disappointed that there wasn't sync cable port on my B10x Plus units.
Batteries leak, remotes break, things get lost, etc. Optical triggers aren't always a viable option.
Please ALWAYS include a non-proprietary sync port in your lights!