Should i replace the condenser or the whole unit?

Would it be useful or even necessary to replace all of the HVAC at the same time the condenser is being replaced for AC Repair in Mount Pleasant SC? What is the benefit of replacing the capacitor completely instead of simply giving it a new motor for AC Repair in Mount Pleasant SC? The condenser is old enough to absorb the now-banned fluid for AC Repair in Mount Pleasant SC. Would it be useful or even necessary to replace all of the HVAC at the same time the condenser is being replaced for AC Repair in Mount Pleasant SC? What is the benefit of replacing the capacitor completely instead of simply giving it a new motor for AC Repair in Mount Pleasant SC? The condenser is old enough to absorb the now-banned fluid for AC Repair in Mount Pleasant SC.