i... suppose it would be hard to say beyond pattern recognition and intuiting from behaviors general to various subgroups of humans and from behaviors specific to the person that can be extrapolated from and imported to your contexts
whether this (or any) response was really sought, i dont know (and i imagine people sometimes just habitually tend toward thinking aloud in a rhetorical tone), but
depending on priorities...as far as what i would guess from my second opinion, blissful ignorance may allow a relationship to cool-- not necessarily to be sustained, but simply to let it remain irrelevant from the immediate present beyond mere memory, which a person can digest on their own when they have the space/time to. or in another scenario, it may instead deprive someone of resolution or closure that may have been possible through dialogue and clarity and reconciliation, but this may only be comparably relevant in more specific cases
i imagine there could be a blissful ignorance moreso derived from conclusions either of you may develop/crystallize/calcify in mind about relevant categories of people generally as a result of this relationship, in which case i believe that's probably something that either is likely to eventually be substantiated anyway to some extent (by you through further interaction, if about people in general with relevant qualities and their reactions to you) or is something that would hopefully be able to at least be an impression/conclusion localized only to you if it must result that way (by them, if the relevant qualities are specific mostly/only to you, unless this is also considering), but of course the impact of events in general is tricky to anticipate and some things may be lasting while other things aren't (for either of you)
the probability of spite and jadedness, i'm not really sure how it would arise, and so in lacking context and familiarity with how people respond to whatever characteristics might be related to these interactions, that can't really be something i could speak for yet. if it's something that realistically/historically motivates active/direct spite or jaded perspectives as a normatively recurring human experience, then... well, i can't define what quallfies for that but i imagine you would have your own associations with whatever variety of consequences may exist from that. "more [spiteful/jaded]" seems to imply there already is a history of complication, and if you have history to read from, then my uninformed speculation will probably be a bit obsolete at an individual level
negativistic expectations... while i could hope that there's some way to clarify and negotiate the details of whatever might be a problem to someone else, that's hard to--
--i suddenly doubt any of this is useful or necessarily warranted from me, aaaaand as soon as i had interrupted myself, i am notified that i spent too long typing this and missed my chance to post... a shame, but i chose this and that's my own fault i suppose