No sugar coating:
https://www.nature.com/articles/s41409-019-0624-z
"Death after hematopoietic stem cell transplantation: changes over calendar year time, infections and associated factors"
You should consider not giving up on TKI's just yet. By your note above - it seems your TKI was working, just causing suppression of normal blood cells. Is this correct? If so - there are protocols that can be followed to "pulse" your treatment so that over time your normal blood system recovers. This is what was done for me. I had SEVERE myelosuppression where my neutrophils nearly disappeared. They were suppressed with Imatinib and very much more suppressed taking dasatinib. My oncologist, who is an expert researcher in the field, suggested I go on and off with dasatnib starting at a very low dose and then work dose upwards as needed. It took many months of on again, off again and each time my blood system was allowed to recover and each time it would recover to a better place. I never had my dose increased, the very low dose was sufficient to bring me into remission. My doctor did not want me to take "neupogen" to stimulate my blood system as he believed it also stimulated the cancer. He preferred "pulsing" the drug and measuring my CBC weekly until stable. He said stopping and starting is fine as long as I was in chronic phase (zero or few percent blast cells).
I have a suspicion you can try this approach and it could very well work.
I have been "undetected" now for over two years getting ready to stop therapy all together on a minimal dose of 20 mg.
Stem cell transplant should be an absolute last resort when nothing else works. You still have options.