Comment by KennyBlanken

If you were using a 2009 Mac Pro for work until a year or two ago then you seriously need to think about how much your time is worth and how much of your time you were wasting by "saving money" on not buying a new computer.

If you're self employed, the cost of equipment and depreciation make hanging on to that 2009 system even more of a poor choice.

If you were still using a 2009 system I don't see why you'd "have to replace in 2-3 years."