This overall seems like a very useful resource for EU-based founders.
That said, their suggestion of "Seriously consider back-loaded vesting schedules" is employee unfriendly (https://www.indexventures.com/blog/rewarding-talent-quick-gu..., tip 5)
In particular the idea of a 10/20/30/40 vesting schedule is non-standard, except maybe at places like Amazon. IMHO, if you want to retain people longer, use additional refresh grants instead.