SpaceWire is a highly successful onboard data-link and network technology which is flying in hundreds of spacecraft and which is currently being designed into many, many more. SpaceFibre is the next generation interconnect, which runs over both electrical or fibre-optic media. It provides very high data-rates, high reliability and high availability, all important capabilities for demanding space applications. SpaceFibre is already flying on at least six space missions, and being designed into over sixty more important satellites. SpaceFibre has been at TRL-9 for over four years. It maintains backwards compatibility with SpaceWire at the network level, by using the same packet format and addressing scheme. As well as providing SpaceFibre and AXI-4 interfaces, SpaceFibre routing switches can include SpaceWire interfaces, making it possible to use existing SpaceWire equipment in a mixed SpaceWire and SpaceFibre network. The packets do not know whether they are travelling over SpaceWire or SpaceFibre. This means that existing SpaceWire equipment and software can be reused easily in SpaceFibre networks, building on and continuing the rich legacy of SpaceWire. SpaceFibre supports very high data rates, depending on the speed of the Multi Giga-bit Transceivers (MGTs or SerDes) in the FPGAs being used. The data rate of a link can be increased proportionally using multiple lanes with a maximum of 16 lanes being possible. This paper presents an overview of the key characteristics contributing to the success of SpaceFibre, summarises its use in operational space missions, and outlines the novel capabilities of SpaceFibre which makes it very attractive for space applications. A summary of the latest results from the radiation testing of SpaceFibre on the AMD Versal FPGA are presented. The resource utilisations in several radiation tolerant FPGAs are detailed. The maturity of SpaceFibre for space applications is substantiated.