When you’re ready, maybe get an M4 MacBook Air due in 2025. Give yours a solid 10 year work out. The 2015 was really one of the last great Intel Mac laptops. The 2016 - 2019 were plagued with the Butterfly keyboards, no MagSafe. Yours looks like a 13-inch. Interestingly they are very close in dimensions and weight to the 14-inch MacBook Pro.