Not upgrading is a solid choice. My plan was to continue with my Satoshi v27.0/ node indefinitely, but I made the switch to Knots because the configuration flexibility is superb.

A third option with more devs would be ideal, but I am happy with a single dev with a heavily scrutinized/audited source code by serious bitcoiners.

My new settings cut op_return in half and minimized the time my node relays free transactions. Getting garbage off the chain should be a top priority for any serious bitcoiner.