tl;dr:The common way to paginate in APIs - offset or page number - tends to lead to a "suboptimal" SQL query, requiring databases to find, count and throw away rows. Alexander shows us a better way, using cursor.
tl;dr:Despite championing React, Alexander started to feel that it led to "some questionable practices" e.g. "hovers in JS (rather than in CSS) among others. As a result, he developed TwinSpark, a framework for declarative HTML enhancement.