Anyone tracking signup conversion will realize that phone numbers are autofilled whereas 2FA requires an installation for a greater number of users, leading to drop-off.
I'd buy this (and gift it to everyone I'd think would like it) in an instant. Especially if you somehow included and refined the analysis you have in the blog posts.
You run into ToCToU issues. Even if a chip is "open", how can you be sure the chip you have corresponds to the specification? If that isn't a concern, any FPGA based SoC fits the bill, for example the MNT Reform Kintex-7 module (https://shop.mntre.com/products/mnt-rkx7-fpga-module).
Supply chain attacks can be mitigated with "golden chip analysis", you destructively analyse a known good chip after measuring various power and timing benchmarks across adversarial configurations, and repeat those measurements across all future chips and check they are within margin of error.
Different product at a different price point with different objectives. Security keys are suitable for mass deployment across an entire workforce, precursor aims to be a launchboard for general purpose secure and trustable computation. Even at mass production prices, precursor would likely still cost more than 100$.
Good at what they're being programmed for is a bit of tautology.
FPGAs being selected for performance per watt was only a fairly recent phenomenon, when they were deployed on semi large scale as password crackers/cryptocurrency miners.
Their real strength is ultimately real time processing (DSP or networking), with reconfigurability often quite valuable for networking applications. For DSP applications it's usually because a MOQ of custom silicon can't be justified.
Remember to contribute money/time if you love and use emacs!
Microsoft recently cancelled PayPal for Github sponsors and Tarsius lost significant amounts of income (that was already below minimum wage)[1].
A small contribution, the price of a coffee a week, which for successful developers is very little, goes a long way in supporting open source that doesn't have extensive corporate support like chromium/linux/docker.
What exception? If you are a citizen and intend on returning to the US (or even intend to renounce) you should be in good standing with the IRS (FBARs and annual filings). You owe the difference between locally paid taxes and federal taxes, and can claim overpayment as tax credits.
Most low-earners don't bother with this and use the Foreign Earned Income Exclusion Act [1]. Don't forget about FBARs if you have more than 10k across foreign banks accounts.