I have used both tubed and tubeless pumps and consider pros and cons with both.
I certainly would not consider tubed pumps as old fashioned.
I consider the ability to disconnect a tubed pump to be one of the advantages, especially when playing sport.
If you think disconnecting the pump to be an issue for sex, think about what it is like having a box attached directly.
One of the huge advantages of a tubed pump is the ability to chose the cannula. This is probably the weakest link for a pump but, with a tubeless pump, you have no choice.
I think you are incredibly lucky to have what is considered to be the best closed loop system. Go on, use it and make the most of this privilege.