Paul Horowitz
Since transitioning to emeritus status in 2012, I devoted much of my effort to completion of the 3rd edition of our weighty tome The Art of Electronics (Cambridge University Press, co-author Winfield Hill) and its follow-ons. 2015 saw its publication, and it has now sold some 250 tons of legitimate hardcover copies, plus many impressive counterfeits. We completed its advanced-topic sequel (AoE: the x-Chapters) in 2020, with a second edition in 2026.
In the research arena, following on our group's microwave and optical SETIs at Oak Ridge Observatory, we are deploying a new and mighty all-sky optical SETI with colleagues at UCB, UCSD, and CalTech; it exploits the new technology of silicon photomultipliers, mounting some tens of thousands of them behind dozens of Fresnel lenses, at an array of custom domes at Palomar Observatory.
I've become an amateur historian of science, chronicling (in the annual newsletter) great experimental discoveries in our department. You can find the first seven of them at https://www.physics.harvard.edu/historical-essays-paul-horowitz.
My laboratory home is in the Electronic Instrument Design Lab, which enjoys excellent health and high activity 25 years after its founding. In addition to devising new circuits at my corner bench, I kibitz with students and faculty on their circuit problems; I think of it as "Electronics RAGU" (research and generally useful).
I've continued my involvement with technical aspects of national security. And finally, after too many patent cases, I've sworn off forever involvement in "intellectual property" litigations.