The statistics for website attacks are alarming and the perception that attacks only target large organizations is untrue. Even a small website will receive around 50 attempted attacks in a day. A hacked website will deter visitors who are unlikely to return and will adversely affect your SEO which will continue to impact on site traffic, even after the hack is fixed. In a worse case scenario confidential client data could be compromised resulting in possible financial and legal consequences. The best way to ensure your site is not compromised is to perform regular maintenance, patching and updates of your core and third party modules. So YES, regular Website Maintenance is absolutely essential!