I remember those turn times! it began as early as medieval era, I occasionally played two games at once, or had pdf/other website to read haha
hmm maybe it could be hardware? mine's ahead of above (16-core, 64gb ram, rtx 3090) and I was able to play eternity speed transcendent era on snofru large space map, but I don't know which parts of hardware could affect it, if any. Also game was running much better after closing and reopening, gradually getting worse, occasionally trying to reload save would cause "memory allocation failure", game would close, and after reopening it would run much faster.
E: I also remember almost unplayably slow city queues in late game
each click would cause whole queue to reload, which itself was way slower than is nowadays, and would happen much more often. There were only 2 rows of objects visible at a time, it needed so much scrolling, time spent in city screens was like dozens of times longer. Someone made awesome work making production choices lists dynamic and with more entities visible at once
)
