Actually, I assumed rates went back up to 2017 levels (15% vs 12% etc etc) in 2025 when the Trump cuts are due to expire, but I adjusted the income threshold where they jump from 15 to 25% for inflation. If the Dems take back control, I suspect the Trump cuts won't even make it to 2025.
To the other responses, no grandchildren yet, another thing beyond my control. And as far as leaving a lot of money to my kids, trust me, we are doing our level best to reduce their inheritance every day, but there's a limit to what we can reasonably spend. We just bought a $1000 Roomba vac for our condo and didn't think twice about the expense. Travel for ~ 2 months every year, including international trips, cruises, etc. My net worth has actually increased since retiring, it's higher than it's ever been thanks to the record bull market (which I know won't last for ever).
When we sold our TX house and moved permanently to our beach house, we gave each of our kids a lump sum advance on their inheritance. They all invested 100% of it instead of spending it, so I'm not particularly worried that they'd blow a large inheritance on hookers and blow.