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Cake day: 2024年10月20日

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  • I dislike the Gremlin but dammit, I feel this intensely. Lately, I’ve been feeling this way about car colors. I don’t want a bright green or yellow or orange car… I want some dark blue that doesn’t draw attention to itself. Maybe a gray for the same reason. But looking around at all the black, white, and gray cars, with the occasional navy blue or maroon color has me going crazy and wanting absurdly bright colors again, even if I would never want that for myself.




  • This is more specific to Tesla than self driving in general, as Musk decided that additional sensors (like LiDAR and RADAR on other self driving vehicles) are a problem. Publicly he’s said that it’s because of sensor contention - that if the RADAR and cameras disagree, then the car gets confused.

    Of course that raises the problem that when the camera or image recognition is wrong, there’s nothing to tell the car otherwise, like the number of Tesla drivers decapitated by trailers that the car didn’t see. Additionally, I assume Teslas have accelerometers so either the self driving model is ignoring potential collisions or it’s still doing sensor fusion.

    Not to mention we humans have multiple senses that we use when driving; this is one reason why steering wheels still mostly use mechanical linkages - we can “feel” the road, we can detect when the wheels lose traction, we can feel inertia as we go around a corner too fast. On a related tangent, the Tesla Cybertruck uses steer-by-wire instead of a mechanical linkage.

    This is why many (including myself) believe Tesla has a much worse safety record than Waymo. I’ve seen enough drunk and distracted drivers to believe that humans will always drive better than a human robot. Don’t get me wrong, I still have concerns about the technology, but Musk and Tesla has a history of ignoring safety concerns - see the number of deaths related to his desire to have non-mechanical handles and hide the mechanical backup.








  • If you’re not planning to live there long, I don’t think you shouldn’t be buying; that’s one of the few times I’d choose to rent. I guess maybe if home prices are rising then you can accrue some equity, but then you risk buying at the top of the market. I genuinely how it would compare to a fixed rate mortgage though.

    If you think interest rates are going to decline, you can easily refinance a fixed rate mortgage as well. I don’t see any benefit in that scenario, but there’s a downside in that if rates don’t go down you still have that balloon payment to worry about, and if you don’t qualify for a traditional mortgage, you’re really in a bind.

    Maybe if you’re flipping a house it makes sense, especially if you want to minimize cash outflow. Otherwise, there are so many more downsides that are much more severe than the mild upsides that you might gain. Perhaps there’s a few niche applications that I haven’t considered though.