Fujitsu was using their own in-house SPARC designs with custom vector instructions, but they could see that SPARC is dead and has no future. In fact, not that l

Fujitsu was using their own in-house SPARC designs with custom vector instructions, but they could see that SPARC is dead and has no future. In fact, not that long ago they announced that they will stop sales in 2029 and support 5 years later: https://www.fujitsu.com/global/products/computing/servers/unix/sparc/key-reports/roadmap/index.html https://www.fujitsu.com/global/products/computing/servers/un... So if they wanted to keep pushing their own designs they needed a new architecture, and ARM64 was their best option. The modern SVE extensions were co-designed by ARM and Fujitsu based on their HPC experience.