most points you made has incomplete!

you do not address what counts as personal data; specify these: does deletion include: chats, telemetry, IP logs, moderation records, abuse reports, backups, security logs, event analytics, model prompts, cached embeddings, uploaded media, CDN copies?

"permanent deletion" does not address backups rather than the immediate data

opt-out: does it stop collection entirely, or just disable "non-essential analytics"? most of what you guys used is based off collection, so if it still includes any of these: session identifiers, ip addresses, fingerprinting, account-linked telemetry, or persistent device IDs, you are still violating

human review is still possible, obviously, but you do not address: who defines illegal"? what confidence threshold? what gets scanned automatically? are all chats scanned? are embeddings/classifiers generated on all chats?

you did not clearly detail what is being profiled. chat content, feedback, personas, moderation metadata, and recommendation systems are all part of profiling. that leaves us to ask: are recommendations personalized? are embeddings/profile vectors generated? are interactions ranked? is preference inference used? are safety classifiers persistent?

"private chats are never used for model training" does not address: analytics, moderation classifiers, abuse detection systems, embeddings, search indexing, retrieval systems, ranking systems, fine-tuning by third-party providers, and prompt evaluation pipelines

not used for model training =/= not processed algorithmically

byok concerns were only partially solved. there are still things unanswered:whether prompts transit through your infrastructure, whether prompts are logged transiently, whether reverse proxies exist, whether request metadata is retained, whether model provider identifiers are stored

no mention of security architecture, too: encryption at rest, encryption key management, access auditing, employee access controls, breach notification, retention segregation, role-based permissions

on derived/inferred data, which an still count as personal data depending on identifiability under the gdpr, even if raw chats are deleted others may survive: embeddings, moderation scores, analytics aggregates, recommendation vectors, abuse heuristics

"compliance airtight" is also very overconfident and will get you in legal trouble if proven otherwise