Boris

My eyesight is rather poor, so I don't generally count squares when considering answers. Thus I got myself all hopeful that 19A would be "Clippy."

"[Y]ou could practically inishfay this olehay uzzlepay without ussingsay its emethay and go on with your ayday...." Yes, and I don't feel that I missed out on much of anything with this approach.

OK, there's one bit of crossword hoariness that's been irritating me for quite a while, so on the occasion of 48A, I will note that there is a frankly obnoxious bias built into this trite clue-answer pair, which is that you don't know if someone studying English actually knows more languages than you do in the first place. I have been a technical editor who specialized in prose from non-native speakers. "EFL," for "English as a foreign language," serves quite accurately. And it's nobody's business what time of day someone might have available for such training.

67A betrays a wholesale lack of knowledge about its topic, which is radio signals.

Nice use of misdirection. I wound up having to undo more than a few entries before it all came together.

Re 10D: Yah, try telling that to mine. He considers his job to be done once they've been delivered alive to me to hang out. (Unfortunately, the most recent one is too clever for the humane trap and also talkative, keeping me up at all hours. This has been going on for well over a week.)

Re 54A, I'm prepared for when "aquafaba" shows up.

OK, I can be in a silly mood after a nap, but I got a good chuckle out of 9D. Halfway to Gordon Lightfoot, and there's a nautical reason the general region of Portland, Maine, is called what it is.

As a former editor, I reserve the right to selective presrciptivism. 10D is a contract gig from the Sveriges Riksbank, not a bona fide Nobel.

Fun fact: "Cut the blue wire" cones from Richard Lester's movie "Juggernaut." I'm very fond of this one. He also directed the Beatles movie "Help!"

48D could perhaps have used a bit more nuance, as the ownership is now Japanese.

I really am tired of the repetitive, core error that is 19D. Carbonation is not the same. Your fizzy beverages are not made fizzy by some weird process of injecting air.

Fun with "hash": <a href="https://english.stackexchange.com/questions/438092/why-is-the-word-hash-associated-with-the-character" target="_blank">https://english.stackexchange.com/questions/438092/why-is-the-word-hash-associated-with-the-character</a>

With the small quibble that I tend to think the absurd syncretism with Bön that is 14A may not qualify, that was a lot of fun. The opportunities for misdirection were well deployed.