No one recommends large PST files; oversized PSTs are always prone to corruption. The upper size limit for ANSI PST is 2 GB, for Unicode PST in Outlook 2007 is 20 GB, and while in Outlook 2010/2013/2016/2019 is 50 GB. Oversized PSTs degrades the performance, and the biggest threat is they are more likely to get corrupted.
To get rid of these drawbacks, splitting the PST file is the best solution. Splitting an over-sized PST file into multiple parts upgrades performance and also saves your PST file from getting corrupted. Now, the biggest question arises on how to split PST files?