We also bought in well over 10 years ago, and while the dues go up each year, the biggest jumps are because we keep adding on more points!Dues reflect the real costs to run the resort, that is law. They go up (and down) based on the actual costs to run the resort. When I bought in 10+ years ago, they were a lot lower, but they still had the same relative impact based on inflation. A dollar in dues then is a $1.40 in dues now (or whatever the amount is) and it has the same "feeling" to me.
No two ways about it, DVC is a chunk of change no matter when you buy into it.