Hi,
I'm part of the team that built Sai. If you are curious about the tech, feel free to ask.
We are still limiting signups to keep our costs under control, but you can use the code "SIMULAR" to register. The first 1,000 users get access to Sai for $20/month (regular $200/month).
The blog is fine, it just looks like he didn't foresee that there would be a month where wouldn't post anything, so the navigation links break down. If you go to the last month he posted in, everything works as usual: http://blog.fefe.de/?mon=202505
I find the Swift tooling very lacking. There's no way to lint dead code, there no way to auto format the files exactly as Xcode would do it and tell the linter those rules so that it doesn't lint your auto formatted code. Xcode project files are impossible to edit except with Xcode and Xcode often has issues and I need to manually empty the build folder. These are just some of the issues I remember
Now that some bikes have electronic shifting, you can attack the bike itself. I wrote two blog post about how to downgrade the Shimano Di2 shifters and do a replay attack to remotely shift it. You can find them here:
I think an important factor is also how long you had the same number. I switch numbers every couple of years because I get a new contract and moving the number to the new company is such a hassle. Over time you share your number with more and more companies and people who sell it or get breached.
My parents had their number for ~30 years. I never get spam calls or texts. They get one once a week or so (this is in Germany, we get a lot fewer of these calls).
In theory you cannot even say for all programs and all inputs if the program will finish the calculation [0]. In practice you often can break it down but the number of combinations of input is what makes it impossible to test everything. Most developers try to keep individual functions as small as possible to understand them easier. You can use math to do formal verification, but that gets difficult with real programs too.
We are still limiting signups to keep our costs under control, but you can use the code "SIMULAR" to register. The first 1,000 users get access to Sai for $20/month (regular $200/month).
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