You only need to play the oldies if you want to see how the game was. The stories are available, and Legends improve of the others.
The reason I mention it was in rots, is that the AI is updated in patches, and what was behavior then is not necessarily true anymore.
If you read old AARs you will see issues that are no longer issues. For instance the AI used to never build anything if cashflow was negative, no mater how much money was on hand. Now there are regular (yearly?) checks where the AI builds for a fraction of the cash on hand. If you have suggestion on new ships on, you can see these if you run a bit negative cashflow, but earn money by bonus income and get steadily richer. Once in a while the AI suggests to build ships, but if you wait a bit and click the offer, it is all 0s. This is because the offer was from special rules, and has "expired" (pressing the ship build tool always recalculate the suggestion, but the special offers do of course stand for a little while).
In the game I have abused by fast forwarding now, I sat at 4 million on hand, and saw regular ideas with "build ships for 2.3 million". By the time I noticed them (I was not paying much attention after all), the suggestion was always 0, though.