However, note that I haven't looked too deeply into this topic as of now, so I'm not very knowledgeable on it and am purely asking this question as a fun hypothetical scenario to think about.
So, assuming a highly optimistic scenario where humanity somehow solves all the major problems we're currently facing (climate change, pollution, poverty, hunger, wars, etc.) so that it can be a better and far more sustainable place for all in the future, and life extension becomes easily accessible to all, would you make the decision to extend your life for as long as you want if aging reversal succeeds at some point, and/or if other options to avoid death present themselves such as extensive cybernetic enhancement, mind uploading, etc. within your lifetime? And also, assume that if you choose to extend your life indefinitely you always have the option to peacefully end it or reverse the decision if you so wish, as I know that the thought of living forever can be overwhelming for many, which I'll get into further below.
I personally would, because it is my idealistic pipe dream to witness the development and advancement of humanity into the future every step of the way while exploring what life and emerging new technology can bring to civilization as time moves on. If we can gain useful abilities/enhancements that we previously didn't have for example, I'd love to witness that. If we become a successfully space-faring civilization, I'd also love to witness that. If we find life somewhere out there in the universe, I'd love to witness that too (and if we find peaceful intelligent life, even better.

However, I can see why this might not seem like an appealing option at all to many people. The thought of essentially living forever can be overwhelming for many reasons including (but certainly not limited to) life simply starting to drag on for far too long at some point, having to witness the passing of all friends, family, partners, etc. who chose not to extend their lives which then could lead to extreme feelings of depression and loneliness, uncertainties about any negative effects of life extension on our brains/minds in the long term and if we're able to counteract them before they arise, potential overpopulation challenges which may or may not arise depending on if and how we're able to manage them, or views on life in general.
Also note that it isn't exactly clear what consciousness even is at the moment and what will happen to it in case you go the more extreme cybernetics/mind uploading route, assuming that'll even be possible at some point in the first place. For example (and this is making some wild assumptions), if you're an outside observer who appears to witness a person's consciousness be transported into some kind of network or cybernetic body, to this outside observer, it might look like somebody's consciousness was indeed transported, but is that really the case? Who's to say if the 'original consciousness' has been destroyed in the process of transporting it, leaving a mere replica in the form of a bunch of computer data that appears to function (nearly) the same as the biological individual it was copied from but isn't truly sentient and/or sapient? I believe there's several hypotheses around what makes a consciousness what it is, for example if it's purely physical or if there's more to it, etc., but they're just that: hypotheses.
Anyways, all of this opens the door to some interesting discussions. Would you make the decision to extend your life for as long as you want, and do you want to explain why you would/wouldn't? Any other thoughts? Feel free to share them.

EDIT: Rephrased a few parts of this post for clarity. Previously I asked if you'd like 'to live forever', but since I thought 'forever' was a bit misleading, and due to potential confusion because of this, I rephrased it to 'living for as long as you want'.