So life time to date for OKW dues have gone up ~5% annually, so using that should end around 22.62 in 2042.
That's really not bad over 50 years, started at 2.51.
Its the new resorts, starting in the 8s and going up anywhere from 3-5% annually after the first couple of years (like RIV was flat growth basically first few years) that are going to be crazy numbers in the 40s.
If I did the maths right, BW and BCV using the life to date annual increase amount, they'll end $14.57 and 16.29 respectively in 2042. They didnt have a full 50 years of growth since they were pegged to the OKW expiration date so that helps them out.
My resort, SSR, will look to end around $25.39, also not too crazy high.
*all numbers based on
https://www.dvcresalemarket.com/buying/annual-dues/ as far as dues annual growth percent estimate over time, could end up a lot less or a lot more depending on other factors.