See AMBOSS table here (Treatment regimens based on disease severity) https://next.amboss.com/us/article/VS0GA2?q=inflammatory%20bowel%20disease#Z4272f924349255b3e4babe86d4e939c9
And for UC: https://next.amboss.com/us/article/eS0xA2?q=inflammatory%20bowel%20disease#yw0dlR
Based off these it looks like 5-ASA is still used in mild IBD? I also don’t think these two notes necessarily conflict? Will let someone else look though