I, also, have developed a tummy. Oh wait a minute, I always had one. But said abdomen grew two Humans from scratch - so I give her a lot of grace. Plus - I'm a grandmother now - I need soft places for those babies to land when they need a cuddle. I switched to leggings from pants just prior to the pandemic. Lately, in retirement, I switched to Hue jeggings - which look like skinny jeans but are as comfortable as leggings ever were. I don't think they're probably an option for men. ;) However, it could be worse - my current quest is for a bra that is actually comfortable. Because, just like you, for me - comfort not style defines my wardrobe these days.

Good luck with the suspenders. I hope they work out well for you. And I gotta tell you - the Paleo/Atkins diet thing - you might lose weight & live longer, OR it could just feel that way because you've given up the joys of beer, french fries, and pasta. ;)