Save money: buy from the enemy
People keep joyfully telling me that real men buy wintel or lintel, never SPARC/Solaris - and the numbers on this are compelling: if the rate of increase in x86 price/performance falls by only 18% per year over the first five years after SPARC/Solaris (hypothetically!) disappears, the total cost increase to the x86 buyer community will have achieved for itself will exceed, every year, the total spent to date on SPARC/Solaris.