The muon system of the CMS experiment includes 540 Cathode Strip Chambers (CSCs) that serve as the primary source for muon detection and triggering in the end cap region. The CSCs are intended to operate throughout the life of the CMS experiment, including the challenging environment of the HL-LHC era. To access the longevity of CSCs over the HL-LHC lifespan, a new campaign of accelerated irradiation studies has been performed at the CERN GIF++ facility. Afterwards, additional irradiation tests of both standard and prototype CSCs with reduced concentration of CF4 in the gas mixture have also been conducted, as part of the CERN-wide program to minimise greenhouse gas consumption. In addition, the increased CMS level-1 trigger rate, latency, and data volume foreseen at the HL-LHC will exceed the design specification of the existing CSC detector electronics. Upgrades to electronics target the inner rings of the CSCs in each station, which have the highest particle flux. In this poster we present the results of CSC longevity studies, as well as the capabilities of the newly designed electronics.