I dunno, I don't just look at interest rate, or payment, etc. If it is something I want, and if it serves a purpose for us and makes sense, we usually go that route. When I bought our boat my rate was high since I did just remodeling, parents medical bills, etc. etc. I refinanced it to a lower rate when I could. I wasn't not going to buy it and wait till rates came down. My end game doesn't revolve around how much money I save or don't spend, it revolves in good part around experience, family, etc. Some get hung up on what they think they should pay or what some fictitious loss is based upon what something was before. The money sorts itself out one way or the other. Lost too many people in this life over the years whom didn't get a chance to enjoy a lot of things, because they were always looking too far down the road.
$50k at 9.99% vs $50k at 4.99% at 180 months is $142.00 per month. Meh, not a big deal. Hell I can eat that out at a meal once a month easy. Kids and admiral probably drink that at Starbucks every couple of weeks. Plus you have the option of paying down at an accelerate rate and refinancing to take advantage of rate adjustments.
I am sure not going out and getting a new $1000++ payment on some big ass boat, but to have a boat if I can afford it, I will take the opportunity cost, so that we can enjoy it. I will be prudent, but not forgoe not having/doing something which may never come.