DD-WRT Linux firmware comes to Linksys routers: "Open-source networking users will be happy to learn that Linksys finally made good on its promise to bring DD-WRT firmware to the Linksys router family." :
What is DD-WRT and Benefits of Upgrading Your Router?
Best DD-WRT Router You Can Buy in 2022 - TechSphinx
Everything You Need to Know About DD-WRT | Updated for 2023