Just a typical metal mesh building material can do it. My friend has a house with an accidental Faraday cage like that. 0 bars unless you're near a window, 90% packet loss if you're near a window but not sticking the phone outside. Wifi only works if you're LOS to the access point.
Yeah I'm pretty sure Nvidia just doesn't care to make Mac drivers. For years there was no SIP, Apple sold the Mac Pro which could take Nvidia GPUs, but you basically couldn't use Nvidia because of how bad and outdated the drivers were. I had a GTX 650 in my Mac Pro for a while, it was borderline unusable.
An internal PCIe slot can be had in up to 16x 5.0, whereas Thunderbolt 5 maxes out at 4x of 4.0.
Plus you have another Thunderbolt controller in between the CPU and the hardware, and it takes more energy to push that many bits 1m over a cable vs a few dozen cm over traces.
Also Thunderbolt is trivially disconnected, which in many critical workflows is not a positive, but an opportunity for ill-timed interruptions. Plus I don't have to buy a fucking dongle/dock for a real goddamn slot, make room for external power supplies, etc.
Nvidia GPUs were usable on Intel Macs, but compatibility got worse over time, and Apple stopped making a Mac Pro with regular PCIe slots in 2013. People then got hopeful about eGPUs, but they have their own caveats on top of macOS only fully working with AMD cards. So I've gotten numb to any news about Mac + GPU. The answer was always to just get a non-Apple PC with PCIe slots instead of giving yourself hoops to jump through.
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