After dealing with depression myself, I dove deeply into this world, and actually ended up founding a ketamine and esketamine treatment startup in the Boston area (lumin.health). We've seen pretty amazing results with patients who have otherwise failed antidepressants and/or ECT and TMS (Transcranial Magnetic Stimulation). The reality is that ketamine/esketamine are much more accessible from a patient perspective, and while considered "new" by many in the medical community, offer faster results and carry less stigma for patients than ECT in particular. If ketamine/esketamine don't work, patients typically know within 2-3 sessions, and can walk away with no long term side effects. With ECT, patients generally have to complete a whole course before they see effect, and then are stuck with some of the potential mid/long-term side effects.

The space is also at the precipice of a whole new class of psychedelics coming online - MDMA, psilocybin, and more are all 1-5 years out (working through FDA drug trials), and hold promise of both faster results (versus 6-8 months of trialing traditional antidepressants) and fewer downside risks (versus weight gain, sex drive, etc. issues with antidepressants and memory loss, headaches, etc. with ECT and TMS).

Bottom line, if you're suffering and considering those treatments, I highly recommend finding a local center and at least learning more about options available to you.

Edit: If anyone wants to talk, advice, etc., email is in my profile.