Cyberdeck Legendary Upgrades

I am using the Paraline, so I am unsure if this has anything to do with it specifically or if it affects Tier 5 cyberdecks generally. But whilst the upgrades at earlier tiers from Tier 1 -> Tier 1+ for example would increase ram, buffer and quickhack slots, the very expensive Tier 5 to Tier 5+ or Tier 5++ appear to offer no benefit at all.

Am I missing something or is this an issue others can confirm?
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