Having more investments would make the end game more enjoyable... once you get 400 of everything there isn't much to look forward to. Adding another two high value investment properties would be great.
@LDSPettys it is intenetional - once you hit 50 of all, you get the achievement that doubles all investment speeds, so anything that is at least half way done will instantly complete
@deftriver AI purchases are not permanent, you lose the investment when you soft reset. For that reason, it's better not to spend any AI (IMHO) until you have a substantial AI base
What about an expansion/consolidation deal... something like once you own 200 hockey teams you can spend AI to convert it to a sports franchise. When you first convert the income drops a little (due to more overhead/management costs), and costs of upgrades shoot up, but income also shoots up faster? Just a thought (how many hockey teams are there, really?)!