I think the biggest hindrance to bitcoiner's and bitcoin companies spending their bitcoin is the tax implications.
Most do not live on a bitcoin standard (I think nostr:nprofile1qqsvn0dkjt80raqrxd470c98n7zrdehmcvj6p5hgw3kyku6zyd8z0fqpz4mhxue69uhk2er9dchxummnw3ezumrpdejqzrthwden5te0dehhxtnvdakquw0j5p does an amazing job at allowing bitcoiners to live on a bitcoin standard) and do not want to deal woth reporting or get caught not reporting.
The best thing for bitcoin adoption is not the SBR, it is favorable tax rules.