I know this article focuses on founders, but I'd love to see something done in the industry for employees (especially early employees!) as well.
One of the former companies I worked at never allowed early exercise and issued standard ISO with 90 day expiration upon leaving, which is unfortunately essentially the analogue of "standard and clean" when it comes to employee compensation. By the time I was ready to leave (4+ years, I was very early) all my equity was vested, and buying it required spending ~250k (USD!) between cost of exercising and AMT taxes, all while the company shares were illiquid as ever. The company had no interest in helping me, despite me asking for an extension to the option expiration, they were too bitter that I was leaving and creating significant "damage" to the business.
It was incredibly painful and I felt very cheated and stupid for agreeing to those terms in the first place (actually faced some deep depression and anger against the world for a few months because of this, and thought about going to therapy), but what did I do in the end? I paid out the money. Yes, I wrote a check to my employer for 60k, and another check to the IRS for 190k, depleting my non-emergency savings (and this is from a very frugal person, who never even spent more than 8k on a car, car being my biggest expense ever). There were funds who would lend me the money, but wanted 50%+ of the proceeds, and if the company goes under you're still on the hook for a taxable event when the loan is forgiven.
Luckily AMT for ISO exercise can be slowly (very slowly) recouped in future tax years (and the new tax law made it a bit easier by increasing the deduction and the phaseout limits), but I still had to waste so much of my after tax money just to leave with what I matured over the years. And that money is now sitting in the government pockets for years, producing me no interest and losing value with inflation until I recoup all of it.
Fortunately, a year after I bought those shares one of the investors contacted me and bought some of my equity, so I was able to recoup all what I originally put in (and then some). But it's simply insane, and I am still in the hole for all that AMT that I will recoup in ~10 years, no less.
Other coworkers who left and didn't have the money to come up with the exercise and tax liability, simply lost them, justifying to themselves "well, they're probably not going to be worth anything anyway" (which could be totally true even after paying thousands to exercise them!).
It's a plain insult to startup employees. I wish all startup employees would rebel against this and refused to accept any startup offer unless there was early exercise paid by the company upon joining, or option expiration window of 10+ years.
I, for one, know that will never __ever__ join another startup again for this reason.