I used LFSRs all the time in early FPGAs (XC2000 and XC3000 series). These did not have fast carry chains, so LFSR made a much faster counter than binary. Use

I used LFSRs all the time in early FPGAs (XC2000 and XC3000 series). These did not have fast carry chains, so LFSR made a much faster counter than binary. Used them for video timing generators.