I was asked to benchmark some Solaris/SPARC vs Linux/Intel hardware in around 1997, and the price-performance of the Linux gear was easily 3+ times better. There wasn't really any comparison, especially when you consider how you could buy white box PCs from a local shop, grab a Red Hat ISO for nothing, and have an installed Linux server in 24 hours, compared to weeks to get something more expensive and worse for the Sun option. Even if Sun had been more reliable, it wouldn't have mattered because you could buy 3x the PCs and keep two in a cupboard, or more likely just replace everything with more numerous and better performing Linux PCs which was what we did.