What do you consider light gaming? If it's playing games like CS:GO, League of Legends or Valorant, you'll be fine until your card croaks.
The problem of the 10 series is its rapidly aging Pascal architecture and backseat-level attention to driver issues (as it is EOL and has been superseded by several generations of hardware since). At the end of the day, you must decide if the performance you are getting in the games you play satisfy your needs and/or desires. If you asked me, can you have fun with a 1070 today? I'd say "hell yeah, man!". But if I had to tell you it keeps up with a modern GPU in games designed to take advantage of modern GPU features, then I'm going to have to tell you no, even if these are for the lower spec games released more recently.
Hardware Unboxed did a revisit on the GTX 1080 Ti, and in the handful of games where it is able to compete, it's usually around matching the 5700 XT and most of the time slightly behind the RTX 3060 in performance overall, while missing every single one of the new features introduced in GPUs ever since. With DLSS, for example, the RTX 3060 would leave it in the dust, using a lot less power to achieve the same result, or leaving enough headroom for light raytraced effects.