[red75prime]

> There's no way to transfer consciousness from the biological to the electronic substrate

Transferring? You are thinking small. What about expanding beyond your brain, so that it becomes a small part of a whole and by the time it starts failing it's just a peripheral input preprocessing device/local motion planner/unreliable redundant memory storage/small vote in global decision making and not you.

The possibility is still pretty far. Reliable biocompatible high throughput brain computer interfaces aren't there yet.

[Jamerson]

How about slowly replacing brain cells with synthetic ones while maintaining the consciousness in place?

[red75prime]

Technical difficulties will be much greater. The brain is still a single point of failure. The "expansion" approach allows gradual increase of intelligence thru intermediate exocortex stage, boosting the progress, while studying which information processes/something else corresponds to conscious subjective experiences, paving the way for relocation of consciousness locus outside of the brain or resorting to other measures in a case of impossibility.