If you are on sealed roads virtually all the time, you may get away with what you're suggesting,..but according to the trans/suspension shop who replaced a torn boot on my '96 Camry, he said Toyota CVs are very good quality with decent depth case-hardening and that they will last 200,000 miles easy if they are looked after. So with that in mind, I paid the $150 smackers to have them cleaned, re-packed and re-installed. OTOH, cars like the Mitsubishi Diamante (they're called Mitsy "Magna") out here, have lousey case-hardening which starts to break-up even with no boot problems at around
70,000 miles on sealed roads. So the message was clear (at least to me) look after the originals and they will give excellent service.Jason