… Maverick Philosopher: Why Did Thomas Aquinas Leave his Summa Theologiae Unfinished?
Jonathan Malesic, from whose Commonweal article the above quotation is taken, finds the traditional explanation "suspiciously pious." (My inclination is to say that his rejection of the traditional explanation is suspiciously post-modern.)
Having recently had what I shall call a quasi-mystical experience that seems to have initiated an ongoing process of change in me, I have little difficulty accepting the traditional explanation. Post-modernists' lack of imagination may be grounded in a lack of experience.