The problem with modern unions, particularly in tech, is that the legacy structure is inapt for current problems. Tech workers don't need a union to negotiate compensation, they're compensated fine already. They don't need a huge bureaucratic structure for engaging in long-term detailed negotiations. They don't need a contract at all.
What they need is a no-dues no-fulltime-union-reps union that operates through direct democracy. It does nothing unless the employer is doing something bad wrong. Then if the majority of the union members vote to refuse, either the employer concedes or they strike.
Because it's not about a thousand little things here, it's about a small number of big things. It needs to be able to address those and then go back to being invisible instead of succumbing to feature creep and destroying the host with overhead and principal-agent problems as we've seen with the auto makers.