-> the problem "do people still mine after they don't get any block rewards, but rather only tx fees" doesn't exist
-> the inflation rate will slowly decrease, as the proportion of the coins generated will become smaller and smaller compared to existing coins
these appear to cancel one another out.
if the proportion of coins given for blocks decreases, then the real purchasing power of the block rewards decreases too, eventually this is the same as earning $0.00000000001 to mine a block, effectively zero.