The cost of mining is huge now.
Also I like how we were actually able to mine from the beginning. Thats new.
Keep in mind the true supply will be ~12,500 coins at the end of PoW.
edit: an easy rule of thumb for coins with consistent halvings: take the first mining period, double it, and you have the final supply
in this case the first mining period is 250 blocks * 25 coins = 6250. double that = 12,500, and you have the total number of coins from pow. of course PoS will destroy some of the later blocks but the reward will be so much lower then the overall supply should be minimally effected.