I've been a Cubase man since the days of the Atari..!
Nowadays, I am stuck in OS9 limbo, because a large amount of my hardware (MOTU cards and UAD-1 cards) is PCI, and won't fit in modern computers, but it does the job I need it to, will track 24 tracks simultaneously, and do most of the EQ, comp and reverb work on the UAD's, so my processor rarely gets stressed.
I have an up to date iMac 27" for general computer duties, but having to be forced to buy new hardware, which would be several thousand to upgrade, relegates it to mostly internet duties currently.
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An arranger is just a tool. What matters is what you build with it..!