A quote from the end of the review:
WCP: How do you feel about quitting reviewing?
GJ: My first review was published in 1950 and the time has come. I believe I can still see, hear, think, and feel, but one does grow slower. Because of that personal change, there is the need to guard against misjudging such things as pacing and duration. I'm not going to stop writing. There are two books I have in mind, in fact have started. If ever they are going to be finished, though, it should be now and without many interruptions. Regular reviewing, if done properly, is consuming.