Disclaimer: Alien: Romulus is the first instalment in the franchise I didn't see first in a theatre. As someone who paid to sit through the original Alien it's impossible to describe to younger readers the experience of cinema, which was neither grand nor eclectic.
You bought a ticket to something based on the poster or what was screening on that session.
The lack of explanation and the mystery of what might happen after the titles rolled was an anxiety everyone experienced with any film, let alone horror, let alone a horror that crossed genres.
You're babies now, and movies are babysitting, and the characters in Romulus are likewise babies also, stumbling across discrete parts of the franchise as helpfully labelled as the space station on which it's set.
Alien co-writer and co-creator (with Ronald Shusett) Dan O'Bannon said repeatedly that one of his creative goals for the original was to flip horror's tropes and put the suffering on the male characters. There was an emphasis on the abdominal threat, on invasion of the body, on grotesque helplessness.
It's interesting then how newer instalments in the franchise – including Prometheus and Covenant – have reverted back to the female as the victim. Romulus doubles down on this, then doubles down again.
Not that there's anything wrong with that. Horror movies are about terror. The perverse twist is that the female characters' suffering is now a rite of passage: a validation of strength, proof of worth, etcetera, so sticking it to the girls serves everyone.
Which is too dark for this episode. Alien: Romulus is a chocolate box: a ghost ride compared to Prometheus' chill and Covenant's true body horror. I like Covenant more and more as time goes on. I didn't mind Romulus but it wasn't for me. Going from the original to Ridley Scott's last two was the correct arc for his audience: from concealed horror to sharing too much; from freelance space truckers to corporate drivers; from the careless void of space to the sparkly 4K CGI landscape that cradles every space drama.
Romulus is full of invention but burying invention was what made Alien great: the confusion, the obscured visuals, the noisy mix, the jump cuts, the emotional remove. Uncle Ridley was never coming to save you. Trying to capture that now would be like putting lightning in a bottle. It would confuse viewers. It would frighten them.