While maintenance fees go up, they will be a smaller out of pocket increase than a corresponding increase in a regular hotel room.
For example, you have a
DVC studio that 'costs' 11 points/night, and dues are about $4.50/point. That's equivalent to paying $49.50/night.
A moderate WDW hotel may go for $125/night plus tax, or about $140/night.
Let's say both the dues and the hotel go up by 3% in a year.
Your DVC room now 'costs' you $50.99/night, an increase of $1.49.
The hotel room now costs you $144.20/night, an increase of $4.20.
For a 5 night stay, the difference between the two is a difference of $13.55.
May not be much, but by year 20 with 3% inflation each year, your DVC room only goes to $89.40/night, but your hotel room is $252.85/night.