The whole point of equity is to incentivize people to create value for the company and give them upside in case the company does grow a lot (how people personally value equity is another story, but the incentive is the same). This plan doesn't do that at all...
1) The company says it has no plans to exit so there really isn't an incentive for an employee to think their contributions might return them upside.
2) The 5% figure for all employees is tiny. A growing startup might give away 5-10% in equity, per year, to employees via stock grants. This is 5% total. Every year that goes by employees should own more of the company because they are doing more of the work, a fixed number makes no sense.
3) Past employees who might have made significant contributions and created tons of value get nothing. Do you think if any founders leave they are giving up their real equity?
> it’s a great alternative to the organizational complexity of option grants, acceleration, strike prices, conversion into shares, private markets vs. public markets, dilution by outside parties, partial vesting, etc.
So no, it isn't a great alternative to equity, it does completely different things. It is a random bonus that nobody can expect which is loosely correlated with whatever value they may have contributed. This is certainly better than no bonus, but maybe is worse than a good bonus (though they might also have other bonuses, I have no idea).