SegWit is associated with Bitcoin and its core principles, so its strengths and weaknesses will vary depending on who is observing it.
SegWit’s ability to give blocks more weight, or transaction density, relies on the idea that some blockchain data will be kept off the original chain, which is instead used as a sort of reference or index. Some believe that offloading data from the blockchain is already a failure, as it’s like admitting that blockchain alone can’t function.