Datasheet: https://www.juniper.net/assets/us/en/local/pdf/datasheets/1000489-en.pdf
Mainpage: https://www.juniper.net/documentation/en_US/release-independent/vsrx/information-products/pathway-pages/index.html
Download software: https://support.juniper.net/support/downloads/
Number of physical interfaces supported is dependent on hypervisor limits. On VMware ESXi it is 8 and on KVM it is 16.
Logical interface limit is 2K.
vSRX3.0 targeting 18.2. It will support snapshot, live migration fully