Can I use more than 1,000 cells as input for direct cDNA synthesis using SMART-Seq® mRNA kits?

Can I use more than 1,000 cells as input for direct cDNA synthesis using SMART-Seq® mRNA kits?

Using more than 1,000 cells for direct cDNA synthesis with SMART-Seq® mRNA kits is not recommended, since the excess of cellular mass may inhibit the cDNA synthesis

Ultra-low input NGS-RNA products