The biggest improvement was as I moved from A500+Apollo50@25MHz+RocHard 170MB to A500 Micronik tower, Blizzard2060@50MHz (later 57-64 MHz), PicassoIV with enabled FliFi, 8xCD-Rom, HD-floppy, 3-4 SCSI HDs, Megachip2 and OS 3.1. It took about 6 months to build up to the spec, and the speed difference was impressing - at least tenfold. And about 100x compared to plain A500.