Battery about to die. Now what?

Instinct 2s Solar (40mm) for 3+ years. Love it cus it’s super unpretentious - no colors, no touchscreen, no flashy bezels, etc.

Battery gets kinda weird tho. Around 3 hour activities are draining it almost entirely.

With the Garmin+ subscriptions(haven’t tried it), the fact that I walk, sometimes run and mainly track driving routes, would you recommend me to:

A. Upgrade to Instinct 3 B. Tactix 8 (looks intriguing) C. Switch to Apple Watch Ultra (like some of my many-years-Garmin-user friends did and are super happy). D. Just keep it and charge it regularly (with oxygen meter off).

I know it’s a vague question, yet that’s my idea - to hear all kind of opinions. Thank you!