Postponement or cessation of chemo treatment and your outcome?

My senior oncology nurse estimated that 80 - 80% of the usual dose was probably still a therapeutically effective dose. Even my conservative (good on research but cautious) oncologist was willing to forego the last Taxol dose if I wanted (for a couple of good reasons I persevered, in spite of worsening peripheral neuropathy). I agree with @Sister, a lot of dosages are researched at certain levels but not al all levels. Existing research therefore also can’t tell if a result is cumulative (four doses some good, six better) or spikes at a certain level (four doses mostly ineffective, over seven doses mostly effective).