Thats how software pricing works for almost every software company out there.

You want more features, then you have to pay.

SME's typically have much smaller data sets, infact even in some of the large multi national organisations I've worked for none of the enterprise features they paid for were used, even with many millions of rows, a non partitioned table structure can be made to behave.

Where there is a need for some enterprise features, SME's then just have to evaluate the cost benefit. Is paying for the extra features in Enterprise edition cheaper or more expensive than paying someone to code round the issue?